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Numerical analysis of the descent module and its bottom structure element aerodynamic characteristics during their separation

The paper considers the influence of the parachute compartment hatch cover separating of the descent module on their aerodynamic characteristics. The hatch cover of the parachute compartment is located in the bottom part of the descent module. The flow simulation was carried out using the FlowVision software. The hatch cover trajectory was obtained using a dynamic mesh without accounting gravity for various kinematic parameters of the compartment. Besides, the aerodynamic characteristics of the descent module and the parachute compartment hatch cover during its descending were determined. The paper also identifies the collision modes with the descent module.