Accession Number : ADA264938


Title :   The WINCOF-I Code: Detailed Description


Descriptive Note : Interim rept.,


Corporate Author : PURDUE UNIV LAFAYETTE IN


Personal Author(s) : Murthy, S N ; Mullican, A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a264938.pdf


Report Date : Apr 1993


Pagination or Media Count : 120


Abstract : The performance of an axial-flow fan-compressor unit is basically unsteady when there is ingestion of water along with the gas phase. The gas phase is a mixture of air and water vapor in the case of a bypass fan engine that provides thrust power to an aircraft. The liquid water may be in the form of droplets and film at entry to the fan. The unsteadiness is then associated with the relative motion between the gas phase and water, at entry and within the machine, while the water undergoes impact on material surfaces, centrifuging, heat and mass transfer processes, and reingestion in blade wakes, following peal off from blade surfaces. The unsteadiness may be caused by changes in atmospheric conditions, and at entry into and exit from rain storms while the aircraft is in flight. In a multi-stage machine, with an uneven distribution of blade tip clearance, the combined effect of various processes in the presence of steady or time-dependent ingestion is such as to make the performance of a fan and a compressor unit time-dependent from the start of ingestion up to a short time following termination of ingestion. The original WINCOF code was developed without accounting for the relative motion between gas and liquid phases in the ingested fluid. A modification of the WINCOF code has now been developed, named the WINCOF-1, which can provide the transient performance of a fan-compressor unit under a variety of input conditions.... Turbomachinery, Water ingestion, Computational


Descriptors :   *PERFORMANCE(ENGINEERING) , *JET ENGINES , *AXIAL FLOW COMPRESSORS , INPUT , FLIGHT TESTING , AIRCRAFT , MATERIALS , MIXTURES , FLIGHT , MASS TRANSFER , WATER VAPOR , JET FLOW , THRUST , AVIATION SAFETY , HEAT , FLOW , POWER , FLUIDS , STORMS , BLADE TIPS , AXIAL FLOW FANS , ATMOSPHERICS , AXIAL FLOW COMPRESSOR BLADES , LIQUID PHASES , RAIN , MOTION , EXPERIMENTAL DESIGN , MODIFICATION , IMPACT , DISTRIBUTION


Subject Categories : Jet and Gas Turbine Engines


Distribution Statement : APPROVED FOR PUBLIC RELEASE