火箭发动机导流器和涡轮泵中空化不稳定性和转子动力学载荷（英文）

作     者：Luca d’Agostino Luca d'Agostino

作者机构：Civil and Industrial Engineering Department University of Pisa 

出 版 物：《风机技术》 (Chinese Journal of Turbomachinery)

年 卷 期：2018年第60卷第3期

页      面：45-61页

学科分类：080703[工学-动力机械及工程] 082502[工学-航空宇航推进理论与工程] 08[工学] 0807[工学-动力工程及工程热物理] 0825[工学-航空宇航科学与技术] 

基　　金：The present work has been made possible owing to the continuous support of the European and Italian space agencies over more than two decades. The author would like to acknowledge the invaluable work of his collaborators Fabrizio D'Auria  Emilio Rapposelli  Angelo Cervone  Cristina Bramanti  Lucio Torre  Angelo Pasini  Giovanni Pace  Dario Valentini and Ruzbeh Hadavandi. The author is also especially grateful to Dr. Giorgio Saccoccia  ESA-ESTEC  Nordwijk  The Netherlands  for his constant attention  support and encouragement. Special thanks go to N. A. Quicks and Tina Broom from GMYS-Space 

主　　题：Turbomachines Turbopumps Aerospace Propulsion Rocket Propulsion Liquid Propellant Rocket Engines Liquid Propellant Feed Turbopumps Two-Phase Flows Cavitation Inducers Unsteady Turbopump and Inducer Hydrodynamics Flow Instabilities Rotordynamics Rotordynamic Fluid Forces Cavitation-Induced Flow Instabilities 

摘      要：After a brief review of flow-induced instabilities in turbopumps for liquid propellant feed systems of modern rocket engines, some recent results of the work carried out by the author and his collaborators to elucidate the role of cavitation on the development of unsteady flow phenomena and rotordynamic impeller forces in these machines are illustrated. Specifically, the results are presented of a series of tests conducted in water in the Cavitating Pump Rotordynamic Test Facility(CPRTF) under similarity conditions on a threebladed, tapered-hub, high-head *** flow instabilities detected in these machines include axial cavitation surge oscillations, backflow oscillations, non-synchronous and synchronous(alternating blade) rotating cavitation, higher-order surge and higher-order rotating cavitation, depending on the operational conditions of the machine. The occurrence of these instabilities under the relevant operational conditions is critically *** characterization of the rotordynamic forces acting on the whirling impellers of the above machines under different load and cavitation conditions is also illustrated and discussed. The results have been obtained in the CPRTF by means of a novel experimental technique that allows for the continuous measurement of the rotordynamic force spectra as functions of the whirl ratio. Comparison with simultaneous high-speed movies of the inducer inlet flow highlights the relationship between the cavitation dynamics in the inducer backflow and the spectral behavior of the rotordynamic force as functions of the whirl ratio.