Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 112
Book Description
An Experimental Investigation of Two Large Annular Diffusers with Swirling and Distorted Inflow
Author: An Experimental Investigation of Two Large Annular Diffusers with Swirling and Distorted Inflow
Author: United States. National Aeronautics and Space Administration. Scientific and Technical Information OfficePublisher:
ISBN:
Category : Diffusers
Languages : en
Pages : 103
Book Description
Two annular diffusers downstream of a nacelle-mounted fan were tested for aerodynamic performance, measured in terms of two static pressure recovery parameters (one near the diffuser exit plane and one about three diameters downstream in the settling duct) in the presence of several inflow conditions. The two diffusers each had an inlet diameter of 1.84 m, an area ratio of 2.3, and an equivalent cone angle of 11.5 deg, but were distinguished by centerbodies of different lengths. The dependence of diffuser performance on various combinations of swirling, radially distorted, and/or azimuthally distorted inflow was examined. Swirling flow and distortions in the axial velocity profile in the annulus upstream of the diffuser inlet were caused by the intrinsic flow patterns downstream of a fan in a duct and by artificial intensification of the distortions. Azimuthal distortions or defects were generated by the addition of four artificial devices (screens and fences). Pressure recover data indicated beneficial effects of both radial distortion (for a limited range of distortion levels) and inflow swirl. Small amounts of azimuthal distortion created by the artificial devices produced by only small effects on diffuser performance. A large artificial distortion device was required to produce enough azimuthal flow distortion to significantly degrade the static pressure recovery. (Author).
An Experimental Investigation of Two Large Annular Diffusers with Swirling and Distorted Inflow
Author: United States. National Aeronautics and Space Administration. Scientific and Technical Information OfficePublisher:
ISBN:
Category : Diffusers
Languages : en
Pages : 112
Book Description
NASA Technical Paper
Author: Technical Abstract Bulletin
Author: Scientific and Technical Aerospace Reports
Author: NASA Scientific and Technical Publications
Author: Monthly Catalog of United States Government Publications
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 790
Book Description
Monthly Catalog of United States Government Publications
Author: United States. Superintendent of DocumentsPublisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1256
Book Description
Monthly Catalogue, United States Public Documents
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1268
Book Description