EXPERIMENTAL STUDIES FOR DETERMINING HEAT TRANSFER ON THE RIBBONS OF FIST TYPE PARACHUTES

摘要

Experimental heat transfer studies were conducted on models representing the ribbons of Fist type parachutes. The measurements were made in the Reynolds number ranges from . 03 x 10- to .6 x l(r and from 2. 5 x 10-5 to 5 x 10 where the Reynolds number is based on ribbon width and on the average velocity and properties in the slots between the ribbons. Low ratios of the pressures upstream and downstream of the models were connected with the small Reynolds number tests and high pressure ratios with the large Reynolds number experiments. The effect of ribbon spacing (porosity) upon the heat transfer was investigated. The data are presented in dimension-less form. The data can be used for the prediction of convective heat transfer rates on Fist type parachutes during descent.