A Brief Discussion Regarding Types of Cavitation in Squeeze Film Dampers and Cavitation Effects
Journal Title: INCAS BULLETIN - Year 2017, Vol 9, Issue 1
Abstract
Squeeze film dampers (SFD) are probably the most used shaft control devices in aircraft jet engines; SFDs consist in oil films, elastic elements and various antirotational devices that tune the stiffness and damping of the shafts’ supports and consequently adjust the lateral dynamics of the shaft. Fluid layers in SFDs are usually thin, hence the modeling can often be done using the Reynolds’ theory,; however, some of the main features of the film, namely the behavior of the fluid in the divergent, negative squeeze area, where discontinuities may appear in the liquid, are still subject to intense research. This paper will discuss some aspects regarding the types of cavitation that appear in squeeze film dampers and some of the effects of cavitation on the SFDs.
Authors and Affiliations
Laurentiu MORARU
Keywords
Related Articles
- EP ID EP293074
- DOI 10.13111/2066-8201.2017.9.1.7
- Views 95
- Downloads 0
Nearest Wall Flows – the Genuine Turbulence
Traditionally, the wall-bounded flows are boundary-layer like flows where the velocity gradients normal to the wall u/y are very large and the velocity monotonously increases from zero to about the velocity free flow,...
Advanced Trailing Edge Blowing Concepts for Fan Noise Control
This study documents trailing edge blowing research performed to reduce rotor / stator interaction noise in turbofan engines. The existing technique of filling every velocity deficit requires a large amount of air and is...
About ideal relative motions of rigid heavy body
Consider an origin which is fixed at the Earth’s surface, and a rectangular celestial coordinates axes with this origin. The gravity acceleration is the approximate sum of the centrifugal acceleration of the origin relat...
Mathematical Models and Numerical Simulations for the Blood Flow in Large Vessels
We are proposing a non-Newtonian, Cross type rheological model for the blood flow, under the conditions of an unsteady flow regime connected with the rhythmic pumping of the blood by the heart. We admit the incompressibi...
Frequency Analysis of Uncertain System
This paper is dedicated to the study and analysis of a successfully designed control system, whose capability should always maintain the stability and performance level in spite of the uncertainties in system dynamics an...