A CORRELATION OF FREE FLIGHT AERODYNAMIC HEAT TRANSFER MEASUREMENTS ON POINTED CONES
Abstract
Data obtained from free flight tests on pointed cones having semi-angles from 5 to 35 degrees at Mach numbers from 2 to 5 and Reynolds numbers up to 1.7 x 10 to the 8th power are correlated with simple theoretical formulae. A detailed analysis of the errors in the experimental measurements is presented and from correlations of data having an accuracy of =10% or better, the following conclusions were made: (a) For Reynolds numbers greater than 2 x 10 to the 7th power the experimental Stanton numbers exceed the theoretical conical values by about 11%. (b) The effect of cone-angle on the correction factor applied to flat plate theory to adjust it to conical flow conditions appears to be quite random, the data falling around the normally recommended value of 1.15. (c) The skin temperature, at least for fully turbulent conditions, can be predicted to a high order of accuracy by Hill's method in con junction with Van Driest's theory. (d) Reynolds analogy is well verified by the data and is found to be independent of both Mach number and Reynolds number effects. (e) Owing to poor presentation of the wall temperature data in most of the reports the recovery factor data was found to be unreliable.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1962
- Accession Number
- AD0345966
Entities
People
- M. W. Seel
- P. R. Bignell
- R. A. Brewer