WG
|
- Professor
- Supervisor of Doctorate Candidates
- Supervisor of Master's Candidates
- Name (English):Wang Ge
- Name (Pinyin):WG
- School/Department:航空航天学院
- Degree:Doctoral Degree in Engineering
- Professional Title:Professor
- Status:Employed
- Teacher College:College of Aerospace Engineering
- Discipline:Fluid Mechanics
Aeronautical and Astronautical Science and Technology
Contact Information
- OfficePhone：
- Telephone：
- Email：
- 0451-82519202：
- 13019008393：
- wangge@hrbeu.edu.cn：
- ZipCode：
- PostalAddress：
- Paper Publications
Numerical investigation on a shock-accelerated heavy gas reactive concentric cylinder
Release time:2026-01-05 Hits:
- Impact Factor:4.3
- Journal:PHYSICS OF FLUIDS
- Place of Publication:USA
- Key Words:DEFLAGRATION，ENHANCEMENT，INSTABILITY，WAVES
- Abstract:The reactive shock-concentric-cylinder interaction (RSCCI) is investigated numerically to uncover detonation initiation mechanisms and interface evolution. The H-2-O-2-Xe heavy gas cylinder (molar ratio 2:1:3.67) with a concentrically imbedded N-2 cylinder is impacted by a Mach 2.83 shock wave. The ensuing behaviors of six concentric cylinders, with inner cylinder radius (r(in)) to outer cylinder radius (r) ratios varying from 0.250 to 0.875, are examined. Compared to the reactive shock-cylinder interaction (RSCI), the inner cylinder in RSCCI alters the shock convergence pattern and, therefore, the ignition instant and location. As r(in) increases, particularly when r(in) = 0.750r, the detonation initiation occurs 43.53% earlier than in RSCI, flame filling time is reduced by 23.11%, and final combustion completeness reaches 0.9560, improving by 1.16% over RSCI. A large inner cylinder results in a more flattened post-shock concentric cylinder interface shape in the streamwise direction but a more expanded shape in the spanwise direction. It also reduces the post-shock cylinder area. To have an effective cylinder area expansion, r(in) < 0.500r is found to be imperative. A large inner cylinder also reduces the combustible gas consumption rate, leading to a lower asymptotic average temperature and weakened combustible gas expandability. Convenient theoretical methods are provided to accurately predict the early-stage inert cylinder area, the late-stage reactive cylinder areas in the RSCI case and RSCCI cases with smaller inner cylinders, and finally, the total absolute circulations under reactive conditions. This work is expected to provide theoretical insights that are beneficial to the scramjet combustor design.
- Indexed by:Journal paper
- Discipline:Engineering
- Volume:37(12)
- ISSN No.:1070-6631
- Translation or Not:no