Sign in

Paper Video Conference

Subscribe Submit

  • Home
  • Journals
  • Focus
  • Videos
  • Achievement
  • Fronts
  • Contact Us
Journal Home Online First Current Issue Archive For Authors Journal Information 中文版

2009, Volume 3, Issue 4

Outline

Abstract

Keywords

Frontiers in Energy >> 2009, Volume 3, Issue 4 doi: 10.1007/s11708-009-0037-6

A method of analysis for modal aero-damping of vibrating blade in incompressible flow

Show More

School of Jet Propulsion, Beihang University, Beijing 100083, China;

Available online:2009-12-05

Abstract

By establishing a research model for aero-damping in a uniform incoming flow, the three-dimension analytical algorithm of the modal aero-damping based on the equivalent viscous damping principle was established. The algorithm, which is suited for low-speed flow, to compute aero-damping is based on classical lift line theory in aerodynamics, according to the analytical solution of unsteady aerodynamic force. According to the analytical equations, the modal aero-damping ratio for different nature frequencies of blades in various fluid field conditions can be solved, and the factors to affect the aero-damping can be determined.The first bend and the first torsion’s modal aero-damping ratios of a compressor blade are calculated by using the above algorithms. The results show that the aero-damping cannot be neglected comparing with the structure damping. It reflects the coupling degree between the flow field and the structure field, so the aero-damping is significant to compute the stress and life of blade.

Keywords

compressor ; different ; three-dimension analytical ; classical ; low-speed

Content

关注我们

Website Copyright © 2015 China Engineering Science Press Co., Ltd.

京公网安备 11010502051620号 京ICP备11030251号-2
Follow us
Website Copyright © 2015 China Engineering Science Press Co., Ltd.
京公网安备 11010502051620号 京ICP备11030251号-2