An analysis of the air intake process impacts on powdered fuel compression characteristics

IF 2.8 2区工程技术 Q2 ENGINEERING, MECHANICAL

Experimental Thermal and Fluid Science Pub Date : 2025-06-09 DOI:10.1016/j.expthermflusci.2025.111544

Jiangang Yang , Chunbo Hu , Yijun Cao , Wei Gao , Xiangwen Zhang , Kai Ma

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引用次数: 0

Abstract

To clarify the influence of the tank intake process on the filling characteristics of powdered fuel in a powder ramjet, a method combining powder pneumatic compression experiments and theoretical analysis is employed to study the impact of intake flow rate, powdered fuel stacking height, and flow regulation process on the powdered fuel volume compression ratio (VCR). Based on the Ergun equation and the modified Kawakita equation, a calculation method for the VCR of powdered fuel during the intake process is proposed. The results indicate that the pressure drop between the upper and lower layers of powdered fuel during the intake process is the key factor leading to the volume compression of powdered fuel. Moreover, the VCR of powdered fuel is positively correlated with the intake flow rate and stacking height. The time when the powdered fuel reaches the maximum volume compression ratio (MVCR) is the same as the time when the change rate of gas pressure in the tank stabilizes. The MVCR of powdered fuel in the intake process is 20 %–45 % greater than that in the piston axial compression process. During the flow regulation process, the MVCR of powdered fuel is only related to the maximum intake flow rate and is independent of the regulation process.

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进气过程对粉末燃料压缩特性的影响分析

为了阐明燃料箱进气过程对粉末冲压发动机粉末燃料充装特性的影响，采用粉末气动压缩实验与理论分析相结合的方法，研究了进气流量、粉末燃料堆积高度和流动调节过程对粉末燃料体积压缩比（VCR）的影响。基于Ergun方程和修正的Kawakita方程，提出了粉末燃料进气过程中VCR的计算方法。结果表明，进气过程中粉末燃料上下两层之间的压降是导致粉末燃料体积压缩的关键因素。粉末状燃料的VCR与进气流量和堆积高度呈正相关。粉末燃料达到最大体积压缩比（MVCR）的时间与油箱内气体压力变化率稳定的时间相同。进气过程中粉末燃料的MVCR比活塞轴向压缩过程的MVCR高20% ~ 45%。在流量调节过程中，粉末燃料的MVCR只与最大进气流量有关，与调节过程无关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Experimental Thermal and Fluid Science 工程技术-工程：机械

CiteScore

6.70

自引率

3.10%

发文量

159

审稿时长

34 days

期刊介绍： Experimental Thermal and Fluid Science provides a forum for research emphasizing experimental work that enhances fundamental understanding of heat transfer, thermodynamics, and fluid mechanics. In addition to the principal areas of research, the journal covers research results in related fields, including combined heat and mass transfer, flows with phase transition, micro- and nano-scale systems, multiphase flow, combustion, radiative transfer, porous media, cryogenics, turbulence, and novel experimental techniques.