Accession Number : ADA114831

Title :   Effect of Water on Axial Flow Compressors. Part II. Computational Program.

Descriptive Note : Final rept. 15 Dec 77-30 Sep 80,


Personal Author(s) : Tsuchiya,T ; Murthy,S N B

PDF Url : ADA114831

Report Date : Jun 1981

Pagination or Media Count : 425

Abstract : The subject of air-water mixture flow in axial compressors of jet engines is of practical interest in two contexts of water ingestion: during take-off from rough runways with puddles of water and during flight through rain storms. The change in the compressor performance in turn produces changes in the performance of other components and of the engine as a whole. During the current investigation, (1) an analysis of the effects of water ingestion into a compressor has been carried out leading to the development of a predictive code, the PURDU-WICSTK program and (2) a series of tests have been carried out on a small test compressor with mixtures of gases (containing methane gas to simulate steam) and with air-water droplet mixtures. The experimental results have been compared with predictions, It is concluded that the basic effects of water ingestion into compressors arise through (a) blockage, (b) distortion and (c) heat and mass transfer processes, the changes in blade aerodynamic performance being relatively small. In the case of a compressor of small mass flow and pressure ratio and high operating speed, increased quantities of water ingestion give rise to large quantities of water in the tip region.

Descriptors :   *Axial flow compressors, *Ingestion(Engines), *Water, *Gas turbines, *Jet engines, *Mathematical models, Computer programs, Computations, Takeoff, Rain, Air water interactions, Performance(Engineering), Distortion, Mass flow, Blocking, Flight speeds, Flow rate, Two phase flow

Subject Categories : Numerical Mathematics
      Computer Programming and Software
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE