Flow characterization of supersonic gas jets: Experiments and simulations

In present work, we report an experimental setup that has been developed to characterize highly under-expanded helium and nitrogen jets confined in a vacuum chamber. The evolution of Zone Silence (ZOS) is studied found experimentally measured ZOS for are agreement with empirical relation mathematical model. velocity the jet inside using time flight (TOF) probe without skimmer. We able measures gas itself compared skimmer-based method which subjected further expansion after Moreover, this free from skimmer interference calibration involved it. observe smaller than terminal velocity. This can be attributed losses occur due nozzle geometry. Simulations carried out available DS2V code. Experimentally observed velocities simulated values within uncertainties.