Heat transfer has a significant effect on the transient response process of the cavity. However, there lacks a general method for analyzing the heat transfer in the cavity transient process, resulting in poor transient response simulation accuracy. In this situation, based on the theory of free jet, impinging jet, and heat transfer for flow over a flat surface, a theoretical method for simulating heat transfer in a non-adiabatic cavity with single opening transient charging process is proposed. The transient response process of the pressure and temperature of the cavity is simulated and compared with the experimental data. The results show that the simulation results based on the theoretical method agree well with the experimental data, the maximum relative error of pressure does not exceed 3%, and the maximum relative error of temperature does not exceed 1%. The feasibility and accuracy of the theoretical method are verified. Compared with the experimental data, the maximum relative error of pressure and temperature based on adiabatic model can reach 12% and 14%. Also, the maximum relative error of pressure and temperature based on the isothermal model can reach 6% and 7%. These findings show that the theoretical method significantly improves the simulation accuracy. Meanwhile, the theoretical analysis method has strong universality, and can also greatly reduce the cost of analyzing the transient heat transfer of the cavity, which can effectively support the modeling of non-adiabatic cavity component of air system.
DING Shuiting
,
YU Hang
,
QIU Tian
,
SHAN Xiaoming
,
HE Yihong
. Theoretical analysis method for heat transfer in transient charging of a cavity with single opening[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2020
, 41(1)
: 123221
-123221
.
DOI: 10.7527/S1000-6893.2019.23221
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