FREE MOLECULE FLOW THEORY AND ITS APPLICATION TO THE DETERMINATION OF AERODYNAMIC FORCES

摘要: Abstract : The purpose of this analysis is twofold. It designed as an introduction to free molecule flow theory for those with no background in rarefied gas dynamics or kinetic theory, and it presents exact method the determination forces moments on bodies a flow. Approximate methods are evaluated. Comparison shows that molecular speed ratios AT SATELLITE ALTITUDES THE APPROXIMATE THEORIES, WHICH DO NOT COMPLETELY ACCOUNT FOR RANDOM MOTION OF IMPINGING MOLECULES, ARE SATISFACTORY PREDICTION C sub N M. For elongated at small angles attack, approximate shown be inadequate prediction A. Tables certain functions requisite aerodynamic coefficients presented.