Accession Number : ADA307198

Title :   Dynamic Performance of High Bypass Ratio Turbine Engines with Water Ingestion.

Descriptive Note : Contractor rept. (Final),

Corporate Author : PURDUE UNIV LAFAYETTE IN

Personal Author(s) : Murthy, S. N.

PDF Url : ADA307198

Report Date : APR 1996

Pagination or Media Count : 32

Abstract : The research on dynamic performance of high bypass turbofan engines includes studies on inlets, turbomachinery and the total engine system operating with air-water mixture; the water may be in vapor, droplet, or film form, and their combinations. Prediction codes (WISGS, WINCOF, WINCOF-1, WINCLR, and Transient Engine Performance Code) for performance changes, as well as changes in blade-casing clearance, have been established and demonstrated in application to actual, generic engines. In view of the continuous changes in water distribution in turbomachinery, the performance of both components and the total engine system must be determined in a time-dependent mode; hence, the determination of clearance changes also requires a time-dependent approach. In general, the performance and clearances changes cannot be scaled either with respect to operating or ingestion conditions. Removal of water prior to phase change is the most effective means of avoiding ingestion effects. Sufficient background has been established to perform definitive, full scale tests on a set of components and a complete engine to establish engine control and operability with various air-water vapor-water mixtures.

Descriptors :   *ENGINES, *TURBINES, *INGESTION(ENGINES), TRANSIENTS, REMOVAL, PREDICTIONS, TIME DEPENDENCE, PERFORMANCE(ENGINEERING), DYNAMICS, PHASE TRANSFORMATIONS, VAPORS, TEST METHODS, MIXTURES, CODING, DROPS, AIR WATER INTERACTIONS, INLETS, WATER DISTRIBUTION, TURBOMACHINERY, CLEARANCES, HIGH BYPASS TURBOFANS.

Subject Categories : Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE