THE TURBULENT BOUNDARY LAYER IN ZERO-PRESSURE GRADIENT WITH TRANSPIRATION
Abstract
The need for an accurate method of evaluating drag has become increasingly acute with the development of today's high-performance aircraft. Of particular interest is skin friction, the effects of which govern, to a large extent, the lifting capabilities as well as the maximum speed of aircraft. Until recently, little practical application has been made of boundary layer control by fluid injection and suction through the surface, but past research and recent experiments have shown the practicality of these techniques in obtaining low drag and high lift. Accurate methods for determining the surface shear in such cases are often required for proper evaluation of the various systems. The develop ment of methods for measuring skin friction depends in many cases upon experimental data from which the shear values are calculated, and these methods often show considerable variation. This report is concerned with the comparison of several methods for determining the surface shear of boundary layers with and without transpiration through the surface. Flat-plate conditions, taken here as detonating zero pressure gradient, were maintained throughout the tests.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1963
- Accession Number
- AD0418754
Entities
People
- Robert F. Tanner
Organizations
- Mississippi State University