@inproceedings{4abe2f5ee6dc4c848b33ceeb0eac19c6,
title = "Numerical investigation of multi-element vitiated-air heater for scramjet testing",
abstract = "The scramjet experiment relies on combustion air pre-heaters to provide flight enthalpy simulation. The one-element heater has disadvantages of non-uniform flowfield at the exit plane and high temperature on the injection faceplate. In this paper, a mul-ti-element heater (with seven coaxial injectors) was designed. Numerical simulation of the three-dimensional reacting flow in multi-element heater had been carried out. The two-equation shear stress transport κ-ω turbulence model was used for modeling turbulence and eight-step finite-rate mechanism was used for modeling the H2/Air chemical kinetics. The results show that:(l) the uniformity of exit flowfield is improved significantly by using multi-element coaxial injectors, the temperature non-uniformity coefficient is decreased from 21\% to 8\%, oxygen mole-fraction non-uniformity coefficient is decreased from 17\% to 1.4\%; (2) the heat load of injection faceplate is improved, the highest wall temperature is 650k when L/R=0. 65. The heater could operate for long time test without adding cooling system for the faceplate.",
keywords = "Heater, Injection model, Numerical simulation, Scramjet, Uniformity",
author = "Chaoqun Chen and Xu Xu",
year = "2010",
language = "英语",
series = "Proceedings of 2010 Asia-Pacific International Symposium on Aerospace Technology, APISAT 2010",
publisher = "Northwestern Polytechnical University",
pages = "439--443",
booktitle = "Proceedings of 2010 Asia-Pacific International Symposium on Aerospace Technology, APISAT 2010",
address = "中国",
note = "2010 Asia-Pacific International Symposium on Aerospace Technology, APISAT 2010 ; Conference date: 13-09-2010 Through 15-09-2010",
}