Simulation acquisition method for exhaust coefficient of fairing

• Main Authors: XU SHANSHU, TANG WEI, KO MOO-HWAN, HU YANCHEN, SU HONG, ZHANG JINZE, DU TAO, ZHANG YUNLONG, YAN ZHIJIANG, LIU KAI, LI HUANGLI, LIU HANYU
• Format: Patent
• Language: Chinese; English
• Published: 15.12.2023
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention relates to a simulation acquisition method for a fairing exhaust coefficient. The method comprises the following steps: calibrating an exhaust coefficient CFD numerical calculation model based on single-hole exhaust wind tunnel test data under an incoming flow shearing effect; a calibrated fairing pressure relief exhaust coefficient CFD numerical calculation model is used for calculating the mass flow rate and the exhaust coefficient of the typical shape exhaust hole of the flying carrier rocket under different incoming flow speeds and different fairing internal and external pressure ratio states, and an exhaust coefficient database of the typical shape exhaust hole is constructed; and calculating the internal pressure data of the fairing at different flight time state points by using the exhaust coefficient database of the typical shape exhaust hole, and further correcting the calibrated fairing pressure relief exhaust coefficient CFD numerical calculation model, so that the internal pressure e