Temperature and radiation characteristics of the continuous injection flame of a zirconium dust cloud

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL Advanced Powder Technology Pub Date : 2025-03-01 Epub Date: 2025-01-27 DOI:10.1016/j.apt.2025.104781

Qiuhong Wang , Bin Peng , Jun Deng , Chi-Min Shu , Qingfeng Wang , Guoqiang Dong , Di Wu

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Abstract

The exothermic properties of zirconium powder make it widely used in aerospace, military, atomic energy and other fields. The temperature and radiation characteristics of the continuous jet flame of zirconium dust cloud were studied by a self-designed experimental system. For the zirconium powder injection flame temperature, a comprehensive correction equation for thermocouple temperature measurement was developed for the continuous dust-feeding combustion particle load flow. When the dust cloud concentrations in the non-intermittent flame area are 328.48, 410.35, and 483.59 g/m³, respectively: at the spectral wavelength of 5.0 μm, the zirconium dust cloud jet flame emissivity values are 0.2, 0.19, and 0.18; the maximum flame temperature are 2147.5, 2248.1, and 2377.8 °C; the radiant heat flux characteristics of continuous jet flame of zirconium dust cloud were evaluated by heat flow meter, and the radiant heat fluxes on the surface of zirconium jet flame were calculated to be 42.82, 64.99, and 55.96 kW/m². It is found that the flame emissivity is linearly negatively correlated with the maximum flame temperature of the zirconium jet flame, and the thermal radiation is mainly concentrated in the jet flame body of the zirconium dust cloud.

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锆尘云连续喷射火焰的温度和辐射特性

锆粉的放热特性使其广泛应用于航空航天、军事、原子能等领域。利用自行设计的实验系统，研究了锆尘云连续射流火焰的温度和辐射特性。针对锆粉喷射火焰温度，建立了连续送尘燃烧颗粒负荷流的热电偶测温综合修正方程。当非间歇火焰区粉尘云浓度分别为328.48、410.35和483.59 g/m3时，在光谱波长为5.0 μm处，锆粉尘云射流火焰发射率分别为0.2、0.19和0.18；最高火焰温度分别为2147.5、2248.1、2377.8℃；利用热流计对锆尘云连续射流火焰的辐射热流特性进行了评价，计算得到锆尘云表面的辐射热流分别为42.82、64.99和55.96 kW/m2。研究发现，火焰发射率与锆喷射火焰的最高火焰温度呈线性负相关，热辐射主要集中在锆尘云的喷射火焰体中。

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来源期刊

Advanced Powder Technology 工程技术-工程：化工

CiteScore

9.50

自引率

7.70%

发文量

424

审稿时长

55 days

期刊介绍： The aim of Advanced Powder Technology is to meet the demand for an international journal that integrates all aspects of science and technology research on powder and particulate materials. The journal fulfills this purpose by publishing original research papers, rapid communications, reviews, and translated articles by prominent researchers worldwide. The editorial work of Advanced Powder Technology, which was founded as the International Journal of the Society of Powder Technology, Japan, is now shared by distinguished board members, who operate in a unique framework designed to respond to the increasing global demand for articles on not only powder and particles, but also on various materials produced from them. Advanced Powder Technology covers various areas, but a discussion of powder and particles is required in articles. Topics include: Production of powder and particulate materials in gases and liquids(nanoparticles, fine ceramics, pharmaceuticals, novel functional materials, etc.); Aerosol and colloidal processing; Powder and particle characterization; Dynamics and phenomena; Calculation and simulation (CFD, DEM, Monte Carlo method, population balance, etc.); Measurement and control of powder processes; Particle modification; Comminution; Powder handling and operations (storage, transport, granulation, separation, fluidization, etc.)