Measurment of Damping Ratio of Fuel Sloshing in Baffled Liquid Propellant Tank of KSR-III Rocket

KSR-III 로켓의 액체 연료 탱크 내에서 발생하는 슬로슁 현상의 배플에 의한 감쇄율 측정

Sloshing of fuel in a liquid propellant tank is an important part of the dynamic and the stability analysis of the rocket. Baffles are installed in a propellant tank to reduce the instability due to sloshing. Multi degree of spring-mass-damper model was used to model sloshing of fuel in an axisymmetric tank. The natural frequencies and damping ratios are estimated. In order to verify the estimated natural frequencies and damping ratios, tests are performed for the real propellant tank of KSR-III with single ring baffle. Results of fuel sloshing analysis are compared with those of tests.