Improvement of the performance of small-sized cavitating venturis by inserting obstacles

IF 1.1 4区工程技术 Q4 THERMODYNAMICS Thermal Science Pub Date : 2023-01-01 DOI:10.2298/tsci2304467r

Brahim Rostane, Khaled Aliane, Mohammed Brayyich, Sajad Zearah, Ali Akgul, Barno Abdullaeva, Younes Menni, Abdulrhman Alsharari, Jihad Asad

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Abstract

Cavitating Venturis are simple apparatus used as a flow meter over a broad range of mass-flow rates. The main objective of this work is to introduce obstacles in small-sized cavitating Venturis in order to increase their capacity by raising the critical pressure, i.e. widens the phase of the cavitating mode. Four configurations have been tested depending on the location of these obstacles. This study focused on investigating the numerical performance of cavitating Venturis with different downstream pressures by employing the k-? SST turbulence model and the Rayleigh-Plesset equation for modeling cavitation. The governing equations were solved using the finite volume method, employing the Rhie and Chow pressure-velocity coupling scheme. The results showed the void fraction and streamlines contours obtained on the symmetry plane. The mass-flow ratio was presented for all configurations and different pressure ratios. The study showed that the cavitating Venturis equipped with obstacles extend the phase of choked mode from 10.71% to 21.42% and that the best configuration correspond to the case where the obstacles are placed in the converging section.

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通过插入障碍物改善小型空化风投的性能

空化文丘里仪是一种简单的仪器，可以在很宽的质量流量范围内用作流量计。本工作的主要目的是在小型空化文丘里器中引入障碍物，通过提高临界压力来增加其容量，即扩大空化模式的相位。根据这些障碍物的位置，已经测试了四种配置。本文主要研究了不同下游压力下空化文丘里管的数值性能。海温湍流模型和模拟空化的Rayleigh-Plesset方程。控制方程采用有限体积法求解，采用rihie和Chow压力-速度耦合格式。结果表明，在对称平面上得到了孔隙率和流线轮廓。给出了各种构型和不同压力比下的质量流量比。研究表明，设置障碍物的空化文丘里管将阻塞模式的相位从10.71%扩展到21.42%，障碍物位于收敛段的情况对应于最佳配置。

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来源期刊

Thermal Science 工程技术-热力学

CiteScore

2.70

自引率

29.40%

发文量

399

审稿时长

5 months

期刊介绍： The main aims of Thermal Science to publish papers giving results of the fundamental and applied research in different, but closely connected fields: fluid mechanics (mainly turbulent flows), heat transfer, mass transfer, combustion and chemical processes in single, and specifically in multi-phase and multi-component flows in high-temperature chemically reacting flows processes present in thermal engineering, energy generating or consuming equipment, process and chemical engineering equipment and devices, ecological engineering, The important characteristic of the journal is the orientation to the fundamental results of the investigations of different physical and chemical processes, always jointly present in real conditions, and their mutual influence. To publish papers written by experts from different fields: mechanical engineering, chemical engineering, fluid dynamics, thermodynamics and related fields. To inform international scientific community about the recent, and most prominent fundamental results achieved in the South-East European region, and particularly in Serbia, and - vice versa - to inform the scientific community from South-East European Region about recent fundamental and applied scientific achievements in developed countries, serving as a basis for technology development. To achieve international standards of the published papers, by the engagement of experts from different countries in the International Advisory board.