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Hybrid Nanofluid Flow over a Shrinking Darcy-Forchheimer Porous Medium with Shape Factor and Solar Radiation: A Stability Analysis 具有形状因子和太阳辐射的收缩达西-福克海默多孔介质上的混合纳米流体流动:稳定性分析
Q2 Mathematics Pub Date : 2024-07-05 DOI: 10.37934/cfdl.16.11.6081
Shahirah Abu Bakar, Nurul Syuhada Ismail, Norihan Md. Arifin
This research aimed to develop a numerical solution to analyze the effects of solar radiation and nanoparticle shape factors on the flow of a hybrid nanofluid past a shrinking Darcy-Forchheimer porous medium. The base fluid chosen for this study is water (H2O), and the hybrid nanofluid consists of nanoparticles of silver (Ag) and titanium dioxide (TiO2) in four different shapes: bricks, cylinders, platelets, and blades. To account for solar radiation, the energy model incorporated a radiative heat flux, while the momentum problem considers the influence of a magnetic field. The application of an appropriate similarity transformation method converts the partial differential equations (PDEs) model into a system of nonlinear ordinary differential equations (ODEs). The mathematical model is solved using the shooting technique method and the bvp4c solver. The obtained results, along with the effects of the nanoparticle shape factor, solar radiation parameter, shrinking parameter, Darcy-Forchheimer number, and nanofluid volume fraction, are visually presented through figures and tables. It is worth noting that, in our numerical results, we observed the presence of dual solutions when λ < 0. Our findings indicate that the thermal transmittance increases with an increase in the nanoparticle shape factor and solar radiative parameter. Additionally, we observed an escalation in the velocity distribution in relation to the shrinking parameter and nanofluid volume fraction. Before reaching the two solutions, a flow stability analysis revealed that the first branch appears to be the most stable. Overall, these findings provide valuable insights into the behaviour of hybrid nanofluid flow in the presence of solar radiation and porous media.
本研究旨在开发一种数值解决方案,以分析太阳辐射和纳米粒子形状因素对混合纳米流体流过收缩的达西-福克海默多孔介质的影响。本研究选择的基础流体是水(H2O),混合纳米流体由四种不同形状的纳米银(Ag)和二氧化钛(TiO2)颗粒组成:砖块、圆柱、平板和叶片。为了考虑太阳辐射,能量模型包含了辐射热通量,而动量问题则考虑了磁场的影响。应用适当的相似性转换方法将偏微分方程模型转换为非线性常微分方程系统。数学模型使用射击技术方法和 bvp4c 求解器求解。获得的结果以及纳米粒子形状系数、太阳辐射参数、收缩参数、达西-福克海默数和纳米流体体积分数的影响,通过图和表直观地呈现出来。值得注意的是,在我们的数值结果中,当 λ < 0 时,我们观察到了双重解的存在。我们的研究结果表明,随着纳米粒子形状系数和太阳辐射参数的增加,热透射率也在增加。此外,我们还观察到速度分布与收缩参数和纳米流体体积分数有关。在得出两种解决方案之前,流动稳定性分析表明第一个分支似乎是最稳定的。总之,这些发现为我们了解混合纳米流体在太阳辐射和多孔介质作用下的流动行为提供了宝贵的见解。
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引用次数: 0
Investigating the Actuation of Sidewall Sprinkler in an Atrium Using CFD Simulation 利用 CFD 仿真研究中庭侧墙喷淋器的启动问题
Q2 Mathematics Pub Date : 2024-07-05 DOI: 10.37934/cfdl.16.11.92110
Jaime III Reyes, Jaime Honra
This study investigates the actuation of sidewall sprinklers in large-scale buildings with high-ceilinged atriums, addressing the challenges of unique architectural configurations. Compliance with NFPA 101 requires automatic sprinkler systems, including atrium areas, in these buildings. To maintain aesthetic considerations, design engineers, particularly in the middle east, often propose sidewall sprinklers as an alternative to traditional ceiling sprinklers. This research assesses whether the sidewall sprinklers would actuate during a fire using Fire Dynamic Simulator (FDS). The findings indicate that sidewall sprinklers will fail to actuate if the fire is located at the centre of the atrium, even if the edge of the fire area is below the sprinklers. Furthermore, the study emphasizes the importance of using an FDS mesh resolution (D*/dx) of 6 or finer resolution when measuring temperatures near the flame or fire plume to ensure accurate evaluations of sprinkler activation. These findings provide valuable insights for design engineers and authorities, assisting in decision-making processes related to fire safety measures, system designs, and regulatory compliance.
本研究调查了带有高天花板中庭的大型建筑中侧壁自动喷水灭火系统的启动情况,以应对独特建筑结构所带来的挑战。NFPA 101 标准要求在这些建筑中安装自动喷水灭火系统,包括中庭区域。为了保持美观,设计工程师(尤其是中东地区的设计工程师)通常会建议采用侧墙自动喷水灭火系统来替代传统的天花板自动喷水灭火系统。本研究使用火灾动态模拟器(FDS)评估了侧壁水喷淋设施在火灾中是否会启动。研究结果表明,如果火势位于中庭中心,即使着火区域的边缘低于水喷淋设施,侧墙水喷淋设施也无法启动。此外,研究还强调,在测量火焰或火羽附近的温度时,必须使用 6 分辨率或更精细分辨率的 FDS 网格(D*/dx),以确保准确评估水喷淋设施的启动情况。这些发现为设计工程师和管理机构提供了宝贵的见解,有助于与消防安全措施、系统设计和法规遵从相关的决策过程。
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引用次数: 0
The Effect of Perforated Plate Geometry on Thermofluid Characteristics of Briquette Drying Oven: A 3D Computational Fluid Dynamics (CFD) Study 穿孔板几何形状对煤坯烘干炉热流体特性的影响:三维计算流体动力学 (CFD) 研究
Q2 Mathematics Pub Date : 2024-07-05 DOI: 10.37934/cfdl.16.11.111132
Samsudin Anis, Krisna Tri Romadhoni, Deni Fajar Fitriyana, Aldias Bahatmaka, Hendrix Noviyanto Firmansyah, Natalino Fonseca Da Silva Guterres
The process of drying briquettes in an oven is very costly due to the amount of fuel, labor, and drying time required. Furthermore, inadequate air circulation also results in an uneven and ineffective drying process for briquettes. The performance of the briquette drying oven can be improved by changing the geometry of the perforated plate in the oven to optimize the air distribution. This research process was conducted through Computational Fluid Dynamics (CFD) simulations using Ansys Fluid Flow (Fluent) software by testing three different perforated plate geometries in the oven to determine their effect on the air distribution that occurred in the oven. The research findings indicate that the temperature, velocity, pressure, and airflow pattern of the air are all considerably impacted by the incorporation of perforated plates into the first, second, and third geometries of the oven. When compared to the original geometry, the average air temperature in ovens using the first, second, and third geometries increased by 6.86%, 7.38%, and 9.15%, respectively. Average air velocity increased by 226.04%, 235.77%, and 431.60% in ovens with the first, second, and third geometries. However, the air pressure in ovens with the first, second, and third geometries decreased by 11.05%, 8.62%, and 10.66%. The use of perforated plates on the right, back, and left sides in an oven with the third geometry is the best geometry produced in this research. This happens because this oven produces the most even airflow pattern in the oven compared to other geometries. In addition, the oven with the third geometry has the highest average temperature and average air velocity, with a lower average air pressure compared to the other geometries. Consequently, drying is more effective and takes less time.
由于需要大量的燃料、劳动力和干燥时间,在烘箱中干燥煤球的过程成本非常高。此外,空气流通不足也会导致煤球烘干过程不均匀且效果不佳。通过改变烘箱中穿孔板的几何形状来优化空气分布,可以改善煤球烘箱的性能。这项研究是通过使用 Ansys Fluid Flow(Fluent)软件进行计算流体动力学(CFD)模拟,测试烘箱中三种不同的穿孔板几何形状,以确定它们对烘箱中空气分布的影响。研究结果表明,在烤箱的第一、第二和第三种几何形状中加入穿孔板后,空气的温度、速度、压力和气流模式都会受到很大影响。与原始几何形状相比,使用第一、第二和第三种几何形状的烤箱的平均空气温度分别提高了 6.86%、7.38% 和 9.15%。使用第一、第二和第三种几何形状的烤箱的平均风速分别提高了 226.04%、235.77% 和 431.60%。然而,采用第一、第二和第三种几何形状的烤箱的气压分别降低了 11.05%、8.62% 和 10.66%。在采用第三种几何形状的烤箱中,右侧、后侧和左侧都使用了穿孔板,这是本研究中产生的最佳几何形状。这是因为与其他几何形状的烤箱相比,这种烤箱能产生最均匀的气流模式。此外,与其他几何形状的烤箱相比,第三种几何形状的烤箱具有最高的平均温度和平均风速,而平均风压较低。因此,烘干效果更好,耗时更短。
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引用次数: 0
Effect of Chamfered Turbulators on Performance of Solar Air Heater - Numerical Study 倒角涡轮对太阳能空气加热器性能的影响 - 数值研究
Q2 Mathematics Pub Date : 2024-07-05 DOI: 10.37934/cfdl.16.11.1736
Arunkumar H S, Madhwesh N, Anirudh Hegde K, Manjunath Mallashetty Shivamallaiah, Kota Vasudeva Karanth, Younes Amini
This paper presents a numerical analysis of the thermal performance improvement in a flat plate solar air heater equipped with chamfered turbulators attached below the absorber plate for evaluating performance for Reynolds numbers ranging from 3,000 to 21,000. According to the research, chamfered turbulators caused the flow to become highly turbulent. This flow behaviour with flow separation around the turbulators positively affects performance. This paper attempts to explain the complex flow behaviour found during the analysis. The turbulator diameter varies in 1 mm increments from 3 to 7 mm at a constant longitudinal pitch of 200 mm. The number of turbulator rows in the transverse direction is kept constant at three. The chamfer is represented by the flow attack angle, which can be 30°, 45°, or 60° facing the direction of flow and opposing the direction of flow. The results showed that a 7mm diameter turbulator with a 30° chamfer angle placed against the flow of air yielded a considerably more significant thermal enhancement factor of 1.15 over the spectrum of flow Reynolds number studied
本文对在吸收板下方装有倒角湍流器的平板式太阳能空气加热器的热性能改进进行了数值分析,以评估雷诺数在 3,000 到 21,000 之间的性能。研究表明,倒角涡轮会导致气流高度紊流。这种在涡轮周围出现流动分离的流动行为会对性能产生积极影响。本文试图解释分析过程中发现的复杂流动行为。湍流器直径以 1 毫米为增量,从 3 毫米到 7 毫米不等,纵向间距恒定为 200 毫米。横向的涡轮排数保持不变,为三排。倒角用流攻角表示,流攻角可以是 30°、45° 或 60°,面向流动方向,也可以是与流动方向相反。结果表明,直径为 7 毫米、倒角为 30°、与气流方向相反的湍流器在所研究的雷诺数范围内产生的热增强系数为 1.15,明显更显著。
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引用次数: 0
CFD Analysis of Counter-Rotating Vane-Type Wing Vortex Generator for Regional Aircraft 支线飞机反旋转叶片式机翼涡流发生器的 CFD 分析
Q2 Mathematics Pub Date : 2024-07-05 DOI: 10.37934/cfdl.16.11.116
Gunawan Wijiatmoko, Eflita Yohana, Putro Adi Nugroho, Mohammad Tauviqirrahman, Ivransa Zuhdi Pane
Vortex generator is a component that has a significant impact on aircraft performance. The function of the vortex generator is to create vortices that can optimize the aerodynamic performance of aircraft wings by avoiding air flow separation and increasing lift at high angle of attack. Vortex generator can provide increased lift during take-off and landing due to the increased wing angle of attack. Although the use of vortex generator can be carried out using an experimental approach, a computational fluid dynamic approach to determine the influence of geometric parameters and placement of the vortex generator needs to be carried out. The aim of this research is to determine the effect of parameters like placement on the wing chord, height of the boundary layer, length, shape, angle of incidence and distance between pairs on the lift and drag. The model used as a computational fluid dynamic calculation model is the Spalart Allmaras transient model. As a result, vortex generator does not always have a good effect on aerodynamics. All configurations have a negative influence on the lift and drag values, but the flow separation phenomenon can be reduced significantly. Of all the configurations, the best configuration is obtained by exhibiting an ogive shape, positioned at 13.8% of the chord length, set at a 13o angle of incidence. The vortex generator should have a height closely matching the boundary layer, with a length 6.5 times the height and a pair spacing of 6.7 times the height
涡流发生器是对飞机性能有重大影响的部件。涡流发生器的功能是产生涡流,通过避免气流分离和增加大迎角时的升力来优化飞机机翼的气动性能。由于机翼攻角增大,涡流发生器可在飞机起飞和着陆时增加升力。虽然涡流发生器的使用可以通过实验方法进行,但还需要通过计算流体动力学方法来确定几何参数和涡流发生器位置的影响。本研究的目的是确定翼弦、边界层高度、长度、形状、入射角和对间距离等参数对升力和阻力的影响。计算流体动力学计算模型采用的是 Spalart Allmaras 瞬态模型。因此,涡流发生器并不总是对空气动力学产生良好的影响。所有配置都会对升力和阻力值产生负面影响,但流动分离现象会明显减少。在所有构型中,最佳构型是椭圆形,位于弦长的 13.8%,入射角为 13o。漩涡发生器的高度应与边界层高度密切配合,长度为高度的 6.5 倍,对间距为高度的 6.7 倍。
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引用次数: 0
The Properties of the Physical Parameters in the Triple Diffusive Fluid Flow Model 三重扩散流体流动模型中的物理参数特性
Q2 Mathematics Pub Date : 2024-07-05 DOI: 10.37934/cfdl.16.11.133145
Siti Suzilliana Putri Mohamed Isa, Nanthini Balakrishnan, Kartini Ahmad, Norihan Md. Arifin, Fadzilah Md Ali
The existence of more than one diffusive component in fluid mixtures is observed in these situations: underground water flow, the mechanism of acid rain, the existence of contaminant in some certain mixture, etc. These diffusive components are occurred with the single temperature gradient (since all of the elements are dissolved into the same mixture) and 2 types of concentration gradients (since the dual diffusive components are dissolved in the same mixture). Besides, many industrial and engineering processes are utilizing the concept of convective fluid flow especially over a shrinking sheet. Therefore, a mathematical model for triple-diffusive flow over a nonlinear compressing sheet has been developed in this paper, and subjected to the Soret-Dufour effects. The model comprises of five initial equations namely continuity, momentum, energy, concentration of component 1 and concentration of component 2 equations, together with boundary conditions. These initial equations are expressed as partial differential equations. However, the finalized equations are in the form of ordinary differential equations. Later, the bvp4c programme provided by the Matlab Software is used to solve the ordinary differential equations and the boundary conditions. Three distinct values of each governing parameter are fixed into the bvp4c function, to observe the behaviour of the physical parameters, namely as local Nusselt number and local Sherwood number. The main finding of the dual numerical solutions varies for increasing governing parameters until they intersect at the critical points. In conclusion, the governing parameters affects the heat and mass transfer of the fluid flow model model.
流体混合物中存在不止一种扩散成分的情况有:地下水流、酸雨机制、某些混合物中存在污染物等。这些扩散成分的出现与单一温度梯度(因为所有元素都溶解在同一种混合物中)和两种浓度梯度(因为双重扩散成分溶解在同一种混合物中)有关。此外,许多工业和工程过程都采用了对流流体流动的概念,尤其是在收缩的薄片上。因此,本文建立了非线性压缩片上的三重扩散流数学模型,并对其进行了 Soret-Dufour 效应分析。该模型包括五个初始方程,即连续性方程、动量方程、能量方程、成分 1 浓度方程和成分 2 浓度方程,以及边界条件。这些初始方程用偏微分方程表示。不过,最终确定的方程采用常微分方程的形式。之后,我们使用 Matlab 软件提供的 bvp4c 程序来求解常微分方程和边界条件。在 bvp4c 函数中固定了每个控制参数的三个不同值,以观察物理参数的行为,即局部努塞尔特数和局部舍伍德数。二元数值解的主要结果随着调节参数的增加而变化,直到它们在临界点相交。总之,调节参数会影响流体流动模型的传热和传质。
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引用次数: 0
Computational Elucidation of Electromagnetic Effects on Peristaltic Nanofluid Transport in Microfluidics: Intersections of CFD, Biomedical and Nanotechnology Research 计算阐明电磁对微流控蠕动纳米流体传输的影响:CFD、生物医学和纳米技术研究的交叉点
Q2 Mathematics Pub Date : 2024-07-05 DOI: 10.37934/cfdl.16.11.3759
Hanumesh Vaidya, Rajashekhar Choudhari, Fateh Mebarek-Oudina, Kerehalli Vinayaka Prasad, Manjunatha Gudekote, Balachandra Hadimani, Sangeeta Kalal, Shivaleela
This computational study elucidates electromagnetic field effects on peristaltic transport of nanofluids in microfluidic channels using CFD modeling. The feasibility of electroosmotic micropumping for biomedical applications has garnered interest. However, the unique properties and motion of nanofluids warrant investigation. This work examines the impact on peristaltic heat and mass transfer in a non-uniform microchannel geometry incorporating electroosmosis. By explicitly accounting for electroosmotic factors, the coupled PDE system is solved to obtain concentration, temperature and velocity fields. While the electromagnetic simulations prove essential, a key focus lies on electroosmosis phenomena. Effects on parameters including skin friction, Nusselt and Sherwood numbers are analyzed for Casson and Newtonian nanofluids. Visual probing of trapping events further reveals the role of electroosmosis. Overall, this computational approach provides insights into the multifaceted interplay between peristalsis, nanofluids and electroosmotic flows under electromagnetic forces in microfluidic configurations. The perspectives gained at intersection of CFD, biomedical and nanotechnology domains can facilitate optimized designs of electroosmosis-driven biomedical microdevices.
这项计算研究利用 CFD 模型阐明了电磁场对微流体通道中纳米流体蠕动传输的影响。电渗微泵在生物医学应用中的可行性已引起人们的兴趣。然而,纳米流体的独特性质和运动值得研究。这项研究探讨了电渗透对非均匀微通道几何形状中蠕动传热和传质的影响。通过明确考虑电渗因素,对耦合 PDE 系统进行求解,以获得浓度、温度和速度场。电磁模拟证明是必不可少的,但重点在于电渗现象。分析了卡松和牛顿纳米流体对包括皮肤摩擦、努塞尔特数和舍伍德数在内的参数的影响。对捕集事件的视觉探测进一步揭示了电渗的作用。总之,这种计算方法有助于深入了解微流体配置中电磁力作用下的蠕动、纳米流体和电渗流之间的多方面相互作用。在 CFD、生物医学和纳米技术领域的交叉点上获得的观点有助于电渗驱动的生物医学微器件的优化设计。
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引用次数: 0
Numerical Optimization for Aerodynamic Performance of Nose Cone of FSAE Vehicle through CFD 通过 CFD 数值优化 FSAE 赛车鼻锥的空气动力性能
Q2 Mathematics Pub Date : 2024-07-05 DOI: 10.37934/cfdl.15.11.161171
Amol Dhumal, Nitin Ambhore, Pradip Tamkhade, Atharv Marne, Nihal Muzawar
This paper presents the optimization and aerodynamic performance of a Formula SAE vehicle nose cone. The purpose of the study is to minimize drag while simultaneously enhancing downforce to improve traction and acceleration of the vehicle. Numerous CAD models of the nose cone were developed, taking into account factors such as chassis dimensions, ground clearance, and Formula SAE rulebook constraints. Computational Fluid Dynamics (CFD) analysis is carried out in ANSYS 2021 Fluent module. The fluid domain was created and meshed using tetrahedral cells, and the flow field was predicted using the Realizable k-ε turbulence model. The simulation results revealed essential information including drag and lift coefficients, as well as pressure and velocity contours. An in-depth analysis of lift and drag coefficients guided the optimization of the nose cone design. The study ultimately identified a nose cone design that yielded the most favorable drag coefficient and is found in the range between 0.2-0.3. The study also observed that the down force is increased by 27%. This design proved highly effective in reducing the vehicle's drag and sufficient downforce to enhance acceleration.
本文介绍了 SAE 级方程式赛车鼻锥的优化和空气动力性能。研究的目的是最大限度地减少阻力,同时增强下压力以提高车辆的牵引力和加速度。考虑到底盘尺寸、离地间隙和 SAE 级方程式赛车规则限制等因素,开发了大量鼻锥 CAD 模型。计算流体动力学 (CFD) 分析在 ANSYS 2021 Fluent 模块中进行。使用四面体单元创建流体域并划分网格,使用可实现的 k-ε 湍流模型预测流场。模拟结果显示了包括阻力和升力系数以及压力和速度等值线在内的重要信息。对升力和阻力系数的深入分析为优化鼻锥设计提供了指导。研究最终确定了一种能产生最有利阻力系数的鼻锥设计,其阻力系数范围在 0.2-0.3 之间。研究还发现,下压力增加了 27%。事实证明,这种设计能非常有效地减少车辆的阻力和足够的下压力,从而提高加速度。
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引用次数: 0
The Rheological and Energy Study of the Blade Torsion Effect in a Vessel Stirred by Two- Blade Impeller 双叶叶轮搅拌容器中叶片扭转效应的流变学和能量研究
Q2 Mathematics Pub Date : 2024-07-05 DOI: 10.37934/cfdl.16.11.8291
youcef Kamla, Houari Ameur, Mousaab Beloudane, zied Driss, Abdessalam Hadjeb
This work presents a comprehensive numerical study on the hydrodynamic behaviour and power consumption of a cylindrical vessel stirred by a two-blade impeller, employing the simulation by the RRF method (Rotation Reference Frame). The study focuses on addressing the issue of power consumption in the context of blade orientation referring to different values equal to α=15°, α=30°, α=45°, α=90°, α=135°, and α=180°. The primary objective is to identify a novel design that promotes effective fluid circulation and exhibits lower energy consumption compared to standard geometries. By employing the commercial CFD code ANSYS CFX 14.0, the research delves into the impact of fluid rheology and blade curvature on mixing efficiency. The validation of the results, achieved by comparing them with data from existing literature, demonstrated a satisfactory agreement. According to our obtained results, it has been observed that the energy consumption decreases when the blade orientation exceeds 90°. This study contributes valuable insights into both blade orientation and Reynolds number effects (ranging from 1 to 100 for laminar flow), with the ultimate goal of proposing innovative designs that optimize fluid mixing efficiency while minimizing the consumed energy.
本研究采用 RRF 方法(旋转参考框架)进行模拟,对双叶叶轮搅拌的圆柱形容器的流体力学行为和功耗进行了全面的数值研究。研究重点是解决叶片方向不同情况下的功率消耗问题,叶片方向的不同值分别为 α=15°、α=30°、α=45°、α=90°、α=135° 和 α=180°。主要目的是确定一种新颖的设计,促进有效的流体循环,并与标准几何形状相比能耗更低。通过使用商业 CFD 代码 ANSYS CFX 14.0,该研究深入探讨了流体流变和叶片曲率对混合效率的影响。通过与现有文献中的数据进行比较,对研究结果进行了验证,结果表明两者的一致性令人满意。根据我们获得的结果,当叶片方向超过 90° 时,能耗会降低。这项研究对叶片方向和雷诺数(层流的雷诺数范围为 1 到 100)的影响都提出了有价值的见解,其最终目标是提出创新设计方案,优化流体混合效率,同时最大限度地降低能耗。
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引用次数: 0
Numerical Model Parameters Choice of Helical Savonius Wind Rotor: CFD Investigation and Experimental Validation 螺旋萨沃尼乌斯风力转子的数值模型参数选择:CFD 研究与实验验证
Q2 Mathematics Pub Date : 2024-06-02 DOI: 10.37934/cfdl.16.10.94111
mariem lajnef, Mabrouk Mosbahi, abid Hasna, zied Driss, Emanuele Amato, Tullio Tucciarelli, Marco Sinagra
Electrical power is essential for human beings welfare. The available wind as a clean and renewable source of energy has whetted extensive interest over decades. Savonius vertical axis wind rotor as an energy converter has the merit of being adequate for specific implementations owing to its lower cost and independency on wind direction. From this perspective, multiple studies have been conducted to boost its efficiency. This research work emphasizes on the helical Savonius wind rotor (HSWR). The basic objective is to investigate the impact of selecting the numerical model parameters on its aerodynamic and performance characteristics. Experimental tests were realized with a 3D printed HSWR in a wind tunnel. The experimental performances in terms of power, static and dynamic torque coefficients were addressed. Next, a numerical study was undertaken through Ansys Fluent 17.0 software. Grid, turbulence model and rotating domain size tests were examined. Good accordance was obtained, which validated the numerical model with an averaged error of 5%. The maximum power coefficient proved to be equal to 0.124 at a tip speed ratio of 0.73 and 0.1224 at a tip speed ratio of 0.69, respectively, numerically and experimentally
电力对人类福祉至关重要。几十年来,风能作为一种清洁的可再生能源引起了人们的广泛兴趣。萨沃尼乌斯垂直轴风力转子作为一种能源转换器,具有成本低、不受风向影响等优点,适合具体实施。从这个角度出发,已经开展了多项研究来提高其效率。这项研究工作的重点是螺旋萨沃尼风力转子(HSWR)。基本目标是研究数值模型参数的选择对其空气动力和性能特征的影响。在风洞中对 3D 打印的 HSWR 进行了实验测试。实验研究了功率、静态和动态扭矩系数方面的性能。接着,通过 Ansys Fluent 17.0 软件进行了数值研究。对网格、湍流模型和旋转域大小进行了测试。结果表明,数值模型的平均误差为 5%。数值和实验分别证明,在叶尖速度比为 0.73 时,最大功率系数等于 0.124;在叶尖速度比为 0.69 时,最大功率系数等于 0.1224。
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引用次数: 0
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