한국기계기술학회지 제24권 제5호 (p.912-918)

전산유동해석을 이용한 조속기 실린더 내 잔류공기에 따른 동작지연 영향 연구

A Study on the Effect of Operation Delay on Residual Air in Governor Cylinder by CFD
키워드 :
Governor(조속기),CFD(전산해석),Compressibility flow(압축성 유동),TD AFWP(터빈구동 보조급수펌프),Piston cylinder(피스톤 실린더),VOF(Volume of Fluid) model

초록

CFD was used to study the change in the operation of the governor to check the effect of response delay due to residual air in the governor cylinder, which adjusts the pump RPM of the Turbine Driven Aux. Feed Water Pump(TD AFWP) in the Nuclear power plant. As a result of analysis, as the amount of internal air increased, the time delay also increased proportionally, and a time delay of up to 0.2 sec. occurred. As in the theory, it was confirmed that the cylinder operation delay occurred depending on the presence or absence of a compressive fluid such as air, but the time delay wat not enough to significantly affect the pump operation.