TY - JOUR
T1 - Influences of single-phase/two-phase transpiration cooling on detonation initiation and propagation
AU - Kang, Jianing
AU - Jiang, Yuguang
AU - Wang, Qi
AU - Zhang, Jin
AU - Lin, Yong
AU - Fan, Wei
N1 - Publisher Copyright:
© 2025
PY - 2025/9
Y1 - 2025/9
N2 - Pulse Detonation Engine (PDE) requires highly efficient cooling technology, especially under high frequency and high Mach number. Transpiration cooling is a promising cooling method considering its high cooling capacity. In this work, the influences of single/two phase transpiration cooling on the Deflagration to Detonation Transition process (DDT) and the propagation of detonation wave are investigated experimentally. Regarding single phase transpiration cooling, the supply pressure and cooling Cooling phase of the cooling gas affect the local equivalence ratio, which affects the flame structure and velocity. When Pc (Supply pressure) = 0.4–1.0 MPa, the effect of supply pressure on flame velocity is not significant (The DDT section, Cs(Cooling phase) ≤ -10° The detonation propagation section, Cs ≤ -5°). The two-phase transpiration cooling coolant changes the blocking ratio and affects the flame acceleration. The two-phase transpiration cooling has less interference on detonation propagation section. Local divergent flow passage is formed where the transpiration layer ends. The detonation propagation velocity reduces, but the minimum of which is still higher than 90 % CJ velocity. No decoupling or failure of detonation wave occurs.
AB - Pulse Detonation Engine (PDE) requires highly efficient cooling technology, especially under high frequency and high Mach number. Transpiration cooling is a promising cooling method considering its high cooling capacity. In this work, the influences of single/two phase transpiration cooling on the Deflagration to Detonation Transition process (DDT) and the propagation of detonation wave are investigated experimentally. Regarding single phase transpiration cooling, the supply pressure and cooling Cooling phase of the cooling gas affect the local equivalence ratio, which affects the flame structure and velocity. When Pc (Supply pressure) = 0.4–1.0 MPa, the effect of supply pressure on flame velocity is not significant (The DDT section, Cs(Cooling phase) ≤ -10° The detonation propagation section, Cs ≤ -5°). The two-phase transpiration cooling coolant changes the blocking ratio and affects the flame acceleration. The two-phase transpiration cooling has less interference on detonation propagation section. Local divergent flow passage is formed where the transpiration layer ends. The detonation propagation velocity reduces, but the minimum of which is still higher than 90 % CJ velocity. No decoupling or failure of detonation wave occurs.
KW - Coolant layer thickness
KW - DDT
KW - Detonation
KW - Flame acceleration
KW - Transpiration cooling
UR - http://www.scopus.com/inward/record.url?scp=105004407310&partnerID=8YFLogxK
U2 - 10.1016/j.expthermflusci.2025.111513
DO - 10.1016/j.expthermflusci.2025.111513
M3 - 文章
AN - SCOPUS:105004407310
SN - 0894-1777
VL - 168
JO - Experimental Thermal and Fluid Science
JF - Experimental Thermal and Fluid Science
M1 - 111513
ER -