Accession Number : AD0768377

Title :   Determination of Reentry Corridor Width Based on Heating.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s) : Kessler,John J. ; Tofte,Paul D.

Report Date : JUN 1973

Pagination or Media Count : 145

Abstract : The report contains a two-dimensional study of the reentry corridor for lifting body reentry vehicles with available maximum lift-to-drag ratios of 1, 1.5, 2 and 3. The initial velocity range investigated is from 7.9 km/sec to 23.7 km/sec which encompasses reentry missions from near earth to interplanetary return. Two studies of the reentry corridor are presented: a constant control study where a specific constanc control, angle of attack, was applied from reentry to capture; an optimal control method, differential dynamic programming, was used to determine if the corridor width could be extended from that determined by the constant control by applying an optimal time varying control from reentry to capture. The results of the two studies show that the constant control window is a good approximation of the optimal control window. The boundaries of the reentry corridor are defined by capture and heating rate constraints. (Modified author abstract)

Descriptors :   (*LIFTING REENTRY VEHICLES, *ATMOSPHERE ENTRY), AERODYNAMIC HEATING, DESCENT TRAJECTORIES, LIFT, DRAG, ANGLE OF ATTACK, MANNED SPACECRAFT, DYNAMIC PROGRAMMING, THESES

Subject Categories : Spacecraft Trajectories and Reentry

Distribution Statement : APPROVED FOR PUBLIC RELEASE