Performance of rotating detonation engine with stratified injection
- PDF / 2,032,855 Bytes
- 11 Pages / 595.276 x 841.89 pts (A4) Page_size
- 6 Downloads / 189 Views
734
2020 21(9):734-744
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering) ISSN 1673-565X (Print); ISSN 1862-1775 (Online) www.jzus.zju.edu.cn; www.springerlink.com E-mail: [email protected]
Performance of rotating detonation engine with stratified injection∗ Zhi-di LEI1 , Xiao-quan YANG†‡1 , Jue DING†‡1 , Pei-fen WENG1 , Xun-nian WANG2 1Shanghai
Key Laboratory of Mechanics in Energy Engineering, Shanghai Institute of Applied Mathematics and
Mechanics, School of Mechanics and Engineering Science, Shanghai University, Shanghai 200072, China 2State
Key Laboratory of Aerodynamics, China Aerodynamics Research and Development Center, Mianyang 621000, China † E-mail:
[email protected]; [email protected]
Received Aug. 14, 2019; Revision accepted Jan. 2, 2020; Crosschecked July 15, 2020
Abstract: In this study, a numerical study based on Euler equations and coupled with detail chemistry model is used to improve the propulsion performance and stability of the rotating detonation engine. The proposed fuel injection called stratified injection functions by suppressing the isobaric combustion process occurring on the contact surface between fuel and detonation products, and thus the proportion of fuel consumed by detonation wave increases from 67% to 95%, leading to more self-pressure gain and lower entropy generation. A pre-mixed hydrogen-oxygen-nitrogen mixture is used as a reactive mixture. The computational results show that the propulsion performance and the operation stability of the engine with stratified injection are both improved, the temperature of the flow field is notably decreased, the specific impulse of the engine is improved by 16.3%, and the average temperature of the engine with stratified injection is reduced by 19.1%. Key words: Rotating detonation engine; Injection pattern; Propulsion performance; Instability https://doi.org/10.1631/jzus.A1900383 CLC number: V231
1 Introduction Detonation combustion is a kind of chemical reaction pattern that can yield a higher heat release rate but lower entropy production compared to the ordinary isobaric combustion. Due to the unique advantages of detonation combustion, more scholars have begun to pay attention to the use of detonation to achieve aerospace propulsion. In recent years, the use of detonation for energy release in engines ‡ *
Corresponding author
Project supported by the National Natural Science Foundation of China (No. 11702329), the Open Project Program of the State Key Laboratory of Aerodynamics of China Aerodynamics Research and Development Center (CARDC) (No. SKLA20180101), the CARDC Fundamental and Frontier Technology Research Fund (No. PJD20180143), and the Open Project Program of Rotor Aerodynamics Key Laboratory (No. RAL20180403), China ORCID: Zhi-di LEI, https://orcid.org/0000-0003-2520-8302 c Zhejiang University and Springer-Verlag GmbH Germany, part of Springer Nature 2020
has attracted worldwide attention. Rotating detonation engine (RDE) has a simple structure, which can provide continuous thrust and o
Data Loading...
