Investigation on aerodynamic force effect of vacuum plumes using pressure-sensitive paint technique and CFD-DSMC solution


Pressure-sensitive paint (PSP) technique was employed to experimentally investigate the aerodynamic force effect of vacuum plume in this study. The characterization and comparison for two types of PSP were firstly conducted in an air pressure range from 0.05 to 5000 Pa. The PSPs were prepared using PtTFPP as the active dye and different binders, i.e., polymer-ceramic (PC) and poly(1-trimethylsilyl-1-propyne) [poly(TMSP)]. The static calibrations showed that PtTFPP/poly(TMSP) had a higher pressure sensitivity and a lower temperature dependency compared to PtTFPP/PC in this pressure range. The pressure distributions of a single and two interacting plumes impinging onto a flat plate model were measured using PSP technique. The experimental data were compared to numerical solutions that combined both the computed fluid dynamics (CFD) and direct simulation Monte Carlo (DSMC) methods. Remarkable agreements were achieved, demonstrating the feasibility and accuracy of the numerical approach. Finally, the aerodynamic force effect of interacting plumes at different separation distances was investigated numerically.

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Correspondence to GuoBiao Cai.

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Wu, J., Bitter, M., Cai, G. et al. Investigation on aerodynamic force effect of vacuum plumes using pressure-sensitive paint technique and CFD-DSMC solution. Sci. China Technol. Sci. 60, 1058–1067 (2017).

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  • vacuum plume
  • plume interaction
  • aerodynamic force effect
  • pressure-sensitive paint