Gun Tunnel Force Measurements on Some Thin Delta Wings suitable for Hypersonic Cruising Flight

摘要

The forces developed by sharp delta wings with vee roofs at hypersonic speeds have been experimentally investigated and theoretical considera¬tion given to the relationship of these results to full scale conditions.nThe theoretical development considered the case of upper surfaces held streamwise and derived the maximum lift/drag ratio and corresponding optimum thickness (θ’) which result from applying this restraint. Simple expressions for both these quantities and their variation with Mach number, Reynolds number and surface heat transfer have been obtained using a new formu¬la for pressure versus flow deflection at hypersonic speeds developed for this purpose. When related to practical cruise vehicles operating in the atmosphere, these optimum configurations proved to be unrealistic as they corresponded to vehicles that were only 1° to 2° thick or had very low wing loadings.