An experimental evaluation of transient flows in a supersonic gun tunnel

• Main Authors: Amir A.A.-F., Yusoff M.Z., Ahmed D.I.
• Other Authors: 15750212500
• Format: Article
• Published: Universiti Malaysia Pahang 2023
• Subjects: Gun tunnel; Peak pressure; Shock strength; Shock wave speed; Pressure sensors; Pressure transducers; Supersonic aerodynamics; Transition flow; Experimental evaluation; High speed flows; Measurements of; Pressure history; Short durations; Shock waves

An experimental study has been performed to investigate transient flows in a supersonic gun tunnel. The experimental work was performed using a short duration high speed flow test facility at the Universiti Tenaga Nasional (UNITEN). A physical description of the facility along with the principles of operation is provided. The pressure history of the flow process was captured using a fast response pressure transducer at three stations located at the end of the facility. Experimental measurements of shock strength, peak pressure and shock wave speed change of Air-Air as a driver/driven gas are then presented and compared with a further set of experimental measurements using the gas combination of Helium-Air. The shock wave speed was measured experimentally with a two pressure transducers technique. The results showed that the existence of the piston has a very significant influence on both the moving shock wave and peak pressure value achieved. The results provide a very good estimate for the above-mentioned parameters obtained after diaphragm rupture, and also provide a better understanding of the parameters that affect the performance of the facility. � Universiti Malaysia Pahang.