TANDEM GRID IN A SINGLE STAGE AXIAL BLOWER,

Abstract

In order to achieve high pressure factors in a singlestage axial blower, rotor and stator were equipped with tandem grids. Optimum arrangements of the partial grids were found for different ratios of the diameters. A com parison with the blade arrangements of single-row grids, which were designed for the same pressure and delivery factors, showed that tandem grid blading has better efficiency coefficients and a more advantageous position of the separation point. The tandem grids were especially advantageous in the case of relatively short blades. The pressure factor could be strongly varied through turning of the blades of the second rotor partial grid at an only slightly changed delivery factor, whereby the efficiency coefficient showed only small changes. Measurements in the flow behind the grids and observations of the boundary layers provided statements on the blade losses at tandem grids and at single-row grids. (Author)

Document Details

Document Type
Technical Report
Publication Date
Sep 21, 1964
Accession Number
AD0606782

Entities

People

  • H. Linnemann

Tags

DTIC Thesaurus Topics

  • Boundaries
  • Boundary Layer
  • Coefficients
  • Diameters
  • Efficiency
  • Germany
  • High Pressure
  • Layers
  • Measurement
  • Observation
  • Pressure Measurement
  • West Germany

Fields of Study

  • Physics

Readers

  • Aerospace Engineering
  • Electronics Engineering
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).