TY - JFULL AU - L. Grinis and V. Haslavsky and U. Tzadka PY - 2012/9/ TI - Self-Excited Vibration in Hydraulic Ball Check Valve T2 - International Journal of Aerospace and Mechanical Engineering SP - 1522 EP - 1528 VL - 6 SN - 1307-6892 UR - https://publications.waset.org/pdf/1394 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 68, 2012 N2 - This paper describes an experimental, theoretical model and numerical study of concentrated vortex flow past a sphere in a hydraulic check valve. The phenomenon of the rotation of the ball around the axis of the device through which liquid flows has been found. That is, due to the rotation of the sphere in the check valve vibration is caused. We observe the rotation of the sphere around the longitudinal axis of the check valve. This rotation is induced by a vortex shedding from the sphere. We will discuss computational simulation and experimental investigations of this strong sphere rotation. The frequency of the sphere vibration and interaction with the check valve wall has been measured as a function of the wide range Reynolds Number. The validity of the computational simulation and of the assumptions on which it is based has been proved experimentally. This study demonstrates the possibility to control the vibrations in a hydraulic system and proves to be very effective suppression of the self-excited vibration. ER -