Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
Effect of chemical reaction on high altitude and high speedcavity flow
| DOI: | 10.11809/bqzbgcxb2024.10.019 |
| Keywords: | rarefied gas; hypersonic; chemical reaction; cavity flow; DSMC method |
| Abstract: | The gap or defect structure (similar to cavity flow) on the surface of high altitude high speed aircraft can lead to local aerodynamic heating, which puts forward a test on the local thermal protection ability of aircraft.In this paper, the direct simulation Monte Carlo method (DSMC) was used to study the influence of inlet height H=60 km, Ma=10, different length depth ratio (L/D) on the flow structure in the cavity and the influence of chemical reaction on the heat flux at the bottom of the closed cavity.The results showed that with the increase of length depth ratio (L/D), the pressure coefficient, friction coefficient and surface heat transfer coefficient at the bottom of the cavity increase, and the flow structure of the cavity changes from open to closed when L/D=6.N, O atoms and NO molecules were concentrated on the rear wall of the cavity, and chemical reactions were introduced to reduce the heat flux at the bottom by 5.5%. |
| Issue: | Vol. 45 No. 10 (2024) |
| Published: | 2024-10-31 |
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