SPLITTER EFFECT IN CONICAL DIFFUSERS. PART I. EXPERIMENTAL PHASE INCOMPRESSIBLE FLOW,
Abstract
The effects of a ring-airfoil used as a splitter in a conical diffuser were critically examined. The influence of a ringairfoil on (a) turbulence intensity and boundary layer profile at the diffuser inlet, (b) velocity distributions across the diffuser at stations along the main flow direction, (c) the growth of boundary layer and the velocity gradient at the diffuser wall and (d) the pressure field inside the diffuser, are presented and discussed. The conclusions of this investigation are: (1) The diffuser performance improvement was attributed to the induced velocity around the airfoil, which modified the pressure field inside the diffuser. (2) The diffuser inlet velocity profile and turbulence intensity were very secondary effects. The experimental results were summarized in a partial performance map, which can be used as a designer's guide. The map shows that diffuser pressure recovery efficiency can be increased from 55% to 72%, and improvement of 31% by placing a thin, ring-airfoil in the diffuser as a splitter. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1965
- Accession Number
- AD0615573
Entities
People
- Tah-teh Yang
Organizations
- Clemson University