..., the FPDS leakage is roughly up to 26% larger than the HCS leakage, while the 20-blade LS leaks in between both. The comparison of results shows the LS has insignificant forces compared to those from the HCS and FPDS, both producing a comparable C eff and similar crossover frequencies (C eff > 0...

... [7] San Andres , L. , Lu , X. , and Jie , Z. , 2018 , “ On the Leakage and Rotordynamic Force Coefficients of Pump Annular Seals Operating With Air/Oil Mixtures: Measurements and Predictions ,” Proceedings of Asia Turbomachinery & Pump Symposia , Turbomachinery...

... will also be presented to compare with test results under different flow conditions. e-mail:  hitzhangmin@gmail.com e-mail:  dchilds@tamu.edu 08 07 2021 09 07 2021 27 09 2021 smooth seal multiphase pump flow regime rotordynamic coefficients leakage Smooth annular...

...Xinbo Dai; Xin Yan; Kun He; Jun Li; Zhenping Feng The finite element analysis (FEA) and computational fluid dynamics (CFD) methods are utilized to investigate the leakage performance degradations in two kinds of flexible seals (i.e., forward bending and backward bending) and two kinds of shroud...

... and Childs [ 21 ] is used here. The stator's equation of motion is (13) F − M S A = F S Note that, neither “measured” exit Re nor “measured” Ma is actually measured. Both are resulted from the measured leakage and the calculation of mixture's density and viscosity (Eqs. (6) – (8...

...-liquid to pure-gas conditions. Zhang and Childs (2019) (Zhang, M., and Childs, D., 2019, “A Study on the Leakage and Rotordynamic Performance of a Long Labyrinth Seal Under Mainly-Air Conditions,” ASME J. Eng. Gas Turbines Power, 141(12), p. 121024) conducted a comprehensive experimental study...

...Min Zhang; Dara W. Childs; Dung L. Tran; Hari Shresth The labyrinth seal is one of the most popular noncontact annular seals used in centrifugal compressors to improve machine efficiency by reducing the secondary flow leakage. Reducing the radial clearance C r can effectively decrease the seal's...

...Kali Charan Nayak One of the basic assumptions of the traditional labyrinth seal leakage calculation is that rotation has minimal or no effect on seal leakage. With the advancement of gas turbine technology, to achieve high performance, seals are run at tight clearances and very high rotational...