Investigation of hot jet on active control of oblique detonation waves  

作　　者：Hongbin LI Jianling LI Cha XIONG Wei FAN Lei ZHAO Wenhu HAN 

机构地区：[1]School of Power and Energy,Northwestern Polytechnical University,Xi’an 710072,China [2]Shaanxi Key Laboratory of Internal Aerodynamics in Aero-Engine,Xi’an 710072,China [3]State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China

出　　处：《Chinese Journal of Aeronautics》2020年第3期861-869,共9页中国航空学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.11572258,91441201);NSAF(No.U1730134);Science Challenge Project(No.TZ2016001);National Key Laboratory for Shock Wave and Detonation Physics Research Foundation(No.6142A0304020617);the Fundamental Research Funds for the Central Universities(No.3102017Ax006);the opening project of State Key Laboratory of Explosion Science and Technology(Beijing Institute of Technology)(No.KFJJ1913M)。

摘　　要：The hot jet injection is utilized to actively control the oblique detonation wave,such as initiating and stabilizing an oblique detonation wave at a desired position that is shorter than the length of induction zone,and adjust the height of the oblique detonation wave at the exit of combustor when the oblique detonation wave engine is working on off-design flight conditions.The fifth order Weighted Essentially Non-Oscillatory(WENO)scheme and a two-step reversible reaction mechanism of the stoichiometric H_2/Air are adopted in the simulations.With the help of hot jet injection,the transition from inert oblique shock wave to the oblique detonation wave immediately occurs near the position of hot jet injection,and consequently the length of combustor can be reduced.The angle of oblique detonation wave also decreases as the hot jet injection approaches the nose of wedge.Additionally,the height of the oblique detonation wave at the exit of combustor can be flexibly adjusted,and also depends on the injection position and the strength of the hot jet.If the velocity of the hot jet is too weak to directly trigger the overall oblique detonation wave at the position of injection,increasing the injection pressure will improve the strength of the hot jet and results in a successful transition.

关 键 词：Active control Hot jet Numerical simulation Oblique detonation wave Supersonic propulsion 

分 类 号：V231.2[航空宇航科学与技术—航空宇航推进理论与工程]