TY - JOUR
AU - Zhang, Renhui
AB - To accurately grasp the transient characteristics of complex gas–liquid flow in liquid ring vacuum pump, an experimental test system was established for the characteristics of pressure fluctuation in pump. The pressure fluctuation characteristics and its excitation mechanism at different circumferential positions of pump casing inner wall under different operating conditions were investigated. The results show that there is a strong correlation between the time-domain characteristics of pressure fluctuation on the casing inner wall and the variation of pump hydraulic performance during the start-up period. Due to the high-speed outflow of liquid in the impeller on the suction side strongly interferes with the flow field near the casing inner wall under the action of impeller rotation, the rotor–stator interaction has a greater influence on the pressure fluctuation of the pump casing inner wall on the suction side than that on the exhaust side. From the trailing edge of the suction port to the leading edge of the exhaust port in the pump, the periodicity and stability of the pressure fluctuation on the casing inner wall are worse than those in other regions because of the complex evolution of multi-scale vortex structure caused by the full development of turbulence. The casing inner wall near the leading edge of the suction zone and the trailing edge of the exhaust zone is prone to produce high-intensity separated flow, which shows a complex spatial–temporal variation law with the change of operating conditions.
TI - Experimental study on pressure fluctuation characteristics of gas–liquid flow in liquid ring vacuum pump
JF - Journal of the Brazilian Society of Mechanical Sciences and Engineering
DO - 10.1007/s40430-022-03563-2
DA - 2022-06-01
UR - https://www.deepdyve.com/lp/springer-journals/experimental-study-on-pressure-fluctuation-characteristics-of-gas-rUwhtILue0
VL - 44
IS - 6
DP - DeepDyve
ER -