Accession Number : ADA139953

Title :   Operational Performance Characteristics of a Multiply-Shrouded, Angled-Diffuser Stack Gas Eductor in Turbulent Cross-Flow.

Descriptive Note : Master's thesis,


Personal Author(s) : Staples,R E , Jr

PDF Url : ADA139953

Report Date : Sep 1983

Pagination or Media Count : 219

Abstract : Performance characteristics of two multiple-ring diffuser eductors were determined from collected data. The performance characteristics of a five ring diffuser model were compared with a geometrically similar model tested in cold flow. Model similarity for comparison was maintained through the Mach number. Both models were tested in a turbulent cross-flow simulating a 29.5 knot relative wind. Minor improvement in the pumping coefficient was seen to occur when cross-flow was introduced. External surface temperature measurements along the model assembly were recorded by two methods for comparative analysis. The effect of cross-flow is seen in a significant surface temperature reduction in the shroud assembly while apparent degradation of film cooling effectiveness at the diffuser rings resulted in minimal temperature change. (Author)

Descriptors :   *Gas turbines, *Marine engines, Gas generating systems, Diffusers, Cross flow, Surface temperature, Turbulent flow, Nozzle gas flow, Rings, Theses

Subject Categories : Marine Engineering
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE