低气压风速标定方法误差的仿真研究OA

High-accuracy wind speed calibration under low-pressure conditions is a critical technical requirement for the development and environmental verification of Mars probes and stratospheric vehicles.To address the difficulty in evaluating wind speed calibration errors under such conditions,this study establishes a rotating flow field sliding-mesh model for the rotational calibration method and a submerged-jet wind speed model for the submerged-jet calibration method,and conducts simulations using computational fluid dynamics(CFD)methods.The results indicate that the primary error of the rotational calibration method is caused by gas entrainment.At a wind speed of 15 m/s,the entrainment-induced error can exceed 1.0 m/s.By applying a transient calibration strategy,the total error can be reduced to within 0.5 m/s.For the submerged-jet calibration method,the dominant error originates from non-uniform outlet velocity distributions under low-Reynolds-number conditions.When the wind speed is below 10 m/s,the calibration error is comparable to that of the rotational method.At wind speeds above 15 m/s,the calibration error gradually decreases as the uniform velocity region expands with increasing Reynolds number.The established simulation models and error evaluation methods can provide a reference for the thermal environment testing of Mars probes.