AERODYNAMIC DESIGN OF A CONTINUOUS HYPERVELOCITY WIND TUNNEL
NAVAL ORDNANCE LAB WHITE OAK MD
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A N AERO YNA IC DESIGN STUDY WAS MADE OF A CONTINUOUS, HYPERVELOCI Y IND TU NEL FOR SIMUL I G T E FLIGHT ENVIRONMENT OF LONG-RANGE BALLISTIC MISSILES ND GLIDE V ICLES AT Mach numbers up to 20. Nozzles were designed by the m tho of characteristics for high-temperature air in dissociative and vibrational equilibrium. Since non-equilibriu flow was e pected to occur under many conditions, the effect of a fi ite O r co binatio r te on the flow in hyper onic nozzles was determine for a wide rang of supply conditions. The nozzle turbulent boundary-layer growth and heat ransfer were calculated by a mome tum-integral method e ployi g thermody amic and ransport properties appropriate to hig -temper ure air. The extremely high he t-transf r r tes near the nozzle throat create a severe cooling problem B OTH CONVECTIVE COOLING, USING WATER OR LIQUID METALS, AND FILM COOLING, WITH AIR OR WATER I J CTION RE STUDIED. The application of the electric arc as an air ea ing devic , nd the performance of a hypersonic diffuser were also examined Conclusions re drawn from the resul s of this s udy regarding the range of free-flig t condi io s which can be simul d in the wind unnel.
- Test Facilities, Equipment and Methods