Accession Number : AD0780467

Title :   Research on the Flutter of Axial-Turbomachine Blading.

Descriptive Note : Technical rept.,

Corporate Author : STEVENS INST OF TECH HOBOKEN N J DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Sisto,Fernando ; Ni,Ron Ho

Report Date : MAY 1974

Pagination or Media Count : 31

Abstract : The 'time marching' technique is successfully applied to the numerical computation of the nonstationary aerodynamics of a flat plate cascade for compressible flow of either subsonic or supersonic nature. The unsteady perturbation amplitudes of fluid properties are used as the dependent variables so that the computational domain can be reduced to a two-dimensional channel guided by two adjacent blades for any inter-blade phase angle. A new method of handling the boundary condition is developed with which the order of accuracy for the boundary points will be the same as for the interior points. The wake region behind the trailing edge of each blade in cascade is treated as a 'slip plane' as in two dimensional steady state supersonic flow. Results are in good agreement with existing solutions. (Author)

Descriptors :   *Turbomachinery, *Aeroelasticity, Cascade structures, Flutter, Vibration, Compressible flow, Turbine blades, Numerical analysis

Subject Categories : Fluid Mechanics
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE