Impacts of geometric configurations on performance of discharge coefficient and wall pressure of Venturi meter under high Reynolds number.

The performance of discharge coefficient (C_d) and wall pressure of Venturi meter under various convergent and divergent cone angles have been experimentally investigated. Several models of tubes have been examined, where the tubes have been manufactured with two convergent angles (20° and 40°) and three divergent angles (7°, 11° and 15°). A pipe system along with ten tapping points distributed along the Venturi meter wall has been utilised to measure the static pressure. The examinations have been done for wide ranges of Reynolds number (Re). Results of C_d have been compared with the empirical solutions and they show a good agreement between them with a relative difference less than 3.5%. As Re is increased until Re = 15000, the results of C_d is substantially increased. Results display that the convergent angle has a less impact on C_d and a major influence on pressure drop as compared to divergent angle. Divergent angle has an inversely impact on C_d. The best value of C_d has been obtained when using the tube that has a convergent angle of 7° and divergent angle of 20°. Present results clearly demonstrate the necessity of choosing the required geometric parameters accurately while designing Venturi meter to achieve the optimum performance HIGHLIGHTS: Reduced scale experiments are conducted to analyze and compare the performance of three air supply strategies. Numerical simulation method is verified by experimental data and applied to the analysis of various scenarios. Side air supply is found as the most efficient air distribution form in the isothermal condition and the heating condition. [ABSTRACT FROM AUTHOR]