LAMINAR BOUNDARY LAYER CONTROL BY COMBINED BLOWING AND SUCTION IN THE PRESENCE OF ROUGHNESS,
Abstract
The feasibility of maintaining a fully laminar boundary layer on a given two-dimensional body by means of combined blowing and suction and the effectiveness of blowing for increasing the boundary layer's tolerance to roughness are investigated theoretically. The potential flow past the body is determined by using a suitably selected source distribution and then refining the body obtained from this selection by means of slender body techniques. The boundary-layer calculations are then made for various blowing rates at the stagnation point. The calculations indicate that the combination of suction, applied to maintain a laminar boundary layer, and blowing near the stagnation point, to improve the tolerance of the laminar boundary to roughness, can substantially reduce the skin friction of bodies operating at high Reynolds numbers. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1967
- Accession Number
- AD0666569
Entities
People
- G. F. Anderson
- S. P. Sutera
- Varun S. Murthy
Organizations
- Pennsylvania State University