EXPERIMENTAL STUDY ON JUDGMENT METHOD OF COMBUSTION MODE ON DUAL-MODE SCRAMJET

Li Fei; Wang Zhipu; Yu Xilong; Gu Hongbin; Chen Lihong; Zhang Xinyu

doi:10.6052/0459-1879-14-251

Volume 47 Issue 3

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Chinese Journal of Theoretical and Applied Mechanics > 2015 > 47(3): 389-397. > DOI: 10.6052/0459-1879-14-251 CSTR: 32045.14.0459-1879-14-251

Li Fei, Wang Zhipu, Yu Xilong, Gu Hongbin, Chen Lihong, Zhang Xinyu. EXPERIMENTAL STUDY ON JUDGMENT METHOD OF COMBUSTION MODE ON DUAL-MODE SCRAMJET[J]. Chinese Journal of Theoretical and Applied Mechanics, 2015, 47(3): 389-397. DOI: 10.6052/0459-1879-14-251

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EXPERIMENTAL STUDY ON JUDGMENT METHOD OF COMBUSTION MODE ON DUAL-MODE SCRAMJET

State Key Laboratory of High Temperature Gas Dynamics, Institute of Mechanics, CAS, Beijing 100190, China

Funds: The project was supported by the National Natural Science Foundation of China (11002148, 11372329, 90816015).

Received Date: August 26, 2014
Revised Date: March 26, 2015

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Abstract

Abstract

For a dual-mode scramjet engine, different combustion modes present different flame-stability mechanisms and different flow characteristics. Besides, thrust varies remarkably when mode transition occurs. Therefore, it is extremely important to discriminate combustion mode accurately, so as to capture flame location, measure the distribution of heat release and further optimize combustor design (i.e., configuration and fuel supplying). Since there is no effective experimental method to estimate combustion mode, a new judgment method is proposed in this paper and validation experiments were implemented in a direct-connected scramjet test facility. Multi-diagnostics, including wall pressure, high frame-rate schlieren, CH^* chemiluminescence imaging, and TDLAS (tunable diode laser absorption spectroscopy), were used in these experiments. Distributions of temperature, velocity, Mach number and heat release were obtained simultaneously. These data can be used to discriminate combustion mode and relate different flow/combustion characteristic swith different combustion modes.
- dual mode scramjet,
- combustion mode discrimination,
- heat distribution

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References

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EXPERIMENTAL STUDY ON JUDGMENT METHOD OF COMBUSTION MODE ON DUAL-MODE SCRAMJET