Gas Dynamic Calibration of a Nano-Newton Thrust Stand

Abstract

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Low Reynolds Number Performance Comparison of an Underexpanded Orifice and a DeLaval Nozzle

“…The thrust level is calibrated using an analytical solution to the orifice flow in the free molecule range. [10] This approach has been verified by the Direct Simulation Monte Carlo numerical technique. [11] The orifice and nozzle flows at higher stagnation pressures are calibrated using the orifice data in the free molecule range.…”

“…The nNTS, which has been described in detail by Jamison, et. al [10], was installed in Chamber-IV of the Collaborative High Altitude Flow Facility (CHAFF-IV). CHAFF-IV is a 3 m diameter by 6 m long stainless steel vacuum chamber that was pumped by a 1 m diameter diffusion pump with a pumping speed of 25,000 L/s for nitrogen and 42,000 L/s for helium.…”