Effect of ethylene-rich gas temperature on rotating detonation auto-initiation process

IF 2.8 2区 工程技术 Q2 ENGINEERING, MECHANICAL Experimental Thermal and Fluid Science Pub Date : 2024-06-12 DOI:10.1016/j.expthermflusci.2024.111246
Qiaodong Bai, Han Qiu, Jiaxiang Han, Yuwen Wu, Fang Wang, Chunsheng Weng
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Abstract

In this study, the propagation characteristics of a rotating detonation wave (RDW) between ethylene-rich gas and ambient air were investigated experimentally. The traditional pre-detonator initiation method was abandoned in the experiment, but the spontaneous combustion of high-temperature ethylene-rich gas and air was adopted. The RDW auto-initiated through the deflagration-to-detonation transformation (DDT) process. With an increase in the ethylene-rich gas temperature, the modes of RDW propagation appeared as delayed initiation, dual-wave collision, and fluctuating dual-wave collision modes. When the gas temperature was too high, a secondary detonation wave was produced near the head of the rotating detonation chamber (RDC), which affected the propagation efficiency and stability of the RDW. The increase in gas temperature expanded the equivalence ratio range of auto-initiation, which was due to the higher gas temperature, and more highly active components were precipitated.

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富乙烯气体温度对旋转引爆自动起爆过程的影响
本研究通过实验研究了富乙烯气体与环境空气之间旋转爆轰波(RDW)的传播特性。实验中摒弃了传统的预引爆器起爆方法,而是采用了高温富乙烯气体与空气自燃的方法。RDW 通过爆燃到引爆转化(DDT)过程自动启动。随着富乙烯气体温度的升高,RDW 的传播模式出现了延迟引发模式、双波碰撞模式和波动双波碰撞模式。当气体温度过高时,在旋转起爆室(RDC)头部附近会产生二次起爆波,从而影响 RDW 的传播效率和稳定性。气体温度升高扩大了自动起爆的当量比范围,这是由于气体温度升高,析出了更多的高活性成分。
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来源期刊
Experimental Thermal and Fluid Science
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.
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