ESTIMATE FOR THE PRESSURE ON RAPIDLY ACCELERATING BODIES IN HIGH-SPEED FLIGHT,
Abstract
The pressure on a slender accelerating airfoil or body of revolution traveling at high speed is estimated by using snowplow theory in a plane transverse to the direction of motion. With this theory a simple explicit expression is obtained for the pressure distribution on the body. The theory is valid for rapid accelerations and provides a quantitative estimate of the effect of acceleration on the air forces. The significant parameter measuring the effect is shown to be a Froude number, Fr = (body length) (acceleration) / sq (speed). The results from this analysis show that only in extreme cases does acceleration or deceleration exert an important effect on air forces. For example, a 50-ft missile accelerating 1000 g at Mach 4 has approximately 10 per cent larger wave resistance than one without acceleration. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1965
- Accession Number
- AD0610067
Entities
People
- J. D. Cole
Organizations
- RAND Corporation