Design and Numerical Study of High-Speed Water Tunnel with Interchangeable Test Section

A numerical study was carried out to predict the aerodynamic performance of the flow field of a high-speed water tunnel with an interchangeable test section, the purpose of the interchangeable test section is to study above-water and underwater vehicles namely ships and torpedoes. The design comes with two sets of contractions, test sections, and diffusers with an inlet velocity of 10 m/s. The results of the numerical calculations show equal distribution of the pressure at each section and no evidence of low-pressure regions indicating no flow separations. The velocity contour shows equal distribution of the flow field and no vortex structure has been developed. The velocity at the test section of 1 m case is 26 and 27 m/s for the case of 0.7 m test section. The turbulence intensity obtained from the simulation calculations is 1.8% for the case of the 1 m test section and 2.8% for the case of the 0.7 m test section.