Effect of the air mass flow rate on coal-air two-phase rotating detonation waves

被引：0

作者：

Zhu W. ^{[1
]}

Wang J. ^{[2
]}

Wang Y. ^{[1
]}

Li S. ^{[1
]}

Yang F. ^{[1
]}

Xiang B. ^{[1
]}

Zhang G. ^{[3
]}

机构：

[1] College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing

[2] College of Engineering, Peking University, Beijing

[3] School of Aerospace Engineering, Beijing Institute of Technology, Beijing

来源：

Meitan Xuebao/Journal of the China Coal Society | 2022年 / 47卷 / 10期

关键词：

air mass flow rate; gas-solid two-phase detonation; local equivalence ratio; mode transition; rotating detonation engines;

D O I：

10.13225/j.cnki.jccs.2021.1657

中图分类号：

学科分类号：

摘要：

A lot of studies on rotating detonation engines have been carried out due to the theoretically higher thermal efficiency compared with traditional deflagration engines. However, there are few investigations reported on gas-solid two-phase rotating detonation engines which may be used as solid ramjets. In this paper,two-dimensional numerical simulations based on a non-premixed coal-air rotating detonation engine were carried out. The unsteady viscous model with volumetric reaction was used for the gas phase,the discrete phase model was used for the solid phase,and the kinetics / diffusion-limited rate model was used for the surface combustion of coal. The effect of air flow rate on the rotating detonation wave was studied. The working characteristics of the rotating detonation engine under different modes were analyzed and the numerical simulation results were verified by experiments. Results show that the calculated velocity and flow field of the rotating detonation agree well with the experimental results. The layers between air and parｔｉｃｌｅｓｃｏｕｌｄｎｏｔｃｏｍｐｌｅｔｅｌｙｃｏｉｎｃｉｄｅｗｉｔｈｅａｃｈｏｔｈｅｒｂｅｃａｕｓｅｔｈｅｐａｒｔｉｃｌｅｉｎｊｅｃｔｉｏｎｖｅｌｏｃｉｔｙｗａｓｌｏｗｅｒｔｈａｎａｉｒｉｎｊｅｃｔｉｏｎｖｅｌｏｃｉｔｙ，ａｎｄｔｈｕｓｔｈｅｌｏｃａｌｅｑｕｉｖａｌｅｎｃｅｒａｔｉｏｂｅｆｏｒｅｔｈｅｄｅｔｏｎａｔｉｏｎｗａｖｅｗａｓｈｉｇｈｅｒｔｈａｎｔｈｅｇｌｏｂａｌｅｑｕｉｖａｌｅｎｃｅｒａｔｉｏ．Ａｓｔｈｅａｉｒｍａｓｓｆｌｏｗｒａｔｅｉｎｃｒｅａｓｅｄｆｒｏｍ３８．１４ｋｇ／ｓｔｏ１１４．４０ｋｇ／ｓ，ｔｈｅｖｅｌｏｃｉｔｙａｎｄｔｅｍｐｅｒａｔｕｒｅｐｅａｋｏｆｔｈｅｄｅｔｏｎａｔｉｏｎｗａｖｅｆｉｒｓｔｉｎｃｒｅａｓｅｄａｎｄｔｈｅｎｄｅｃｒｅａｓｅｄ，ａｎｄｐｒｅｓｓｕｒｅｐｅａｋｉｎｃｒｅａｓｅｄｇｒａｄｕａｌｌｙ．Ｔｈｅｄｅｔｏｎａｔｉｏｎｖｅｌｏｃｉｔｙｒｅａｃｈｅｄｔｈｅｍａｘｉｍｕｍａｎｄｔｈｅｍｏｄｅｔｒａｎｓｉｔｉｏｎｐｒｏｃｅｓｓｏｃｃｕｒｒｅｄｗｈｅｎｔｈｅａｉｒｍａｓｓｆｌｏｗｒａｔｅｗａｓ４９．０３ｋｇ／ｓ．Ｃｏｍｐａｒｅｄｗｉｔｈｓｉｎｇｌｅｗａｖｅｍｏｄｅ，ｔｈｅｓｔｒｅｎｇｔｈａｎｄｓｔａｂｉｌｉｔｙｏｆｄｏｕｂｌｅｗａｖｅｍｏｄｅｗｅｒｅｄｅｃｒｅａｓｅｄ．Ａｃｃｏｒｄｉｎｇｔｏｔｈｅｇａｓ-ｓｏｌｉｄｐｈａｓｅｄｉｓｔｒｉｂｕｔｉｏｎｉｎｔｈｅｃｏｍｂｕｓｔｉｏｎｃｈａｍｂｅｒ，ｔｈｅｆｌｏｗｆｉｅｌｄｄｕｒｉｎｇｔｈｅｓｔａｂｌｅｐｒｏｐａｇａｔｉｏｎｏｆｒｏｔａｔｉｎｇｄｅｔｏｎａｔｉｏｎｗａｖｅｃａｎｂｅｄｉｖｉｄｅｄｉｎｔｏｔｈｒｅｅｚｏｎｅｓ：ｆｉｌｌｉｎｇｚｏｎｅ，ｄｅｔｏｎａｔｉｏｎｐｒｏｄｕｃｔｚｏｎｅａｎｄｄｅｆｌａｇｒａｔｉｏｎｐｒｏｄｕｃｔｚｏｎｅ © 2022 China Coal Society. All rights reserved.

引用

页码：3715 / 3728

页数：13

共 46 条

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