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

Abstract

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.

Keywords:

• Discharge coefficient
• static wall pressure
• Venturi meter
• different inlet and outlet cone angles

Acknowledgment

The authors gratefully acknowledge the Northern Technical University, Engineering Technical College of Mosul for their laboratory support for this work.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Availability of data and materials

The data that support the findings of this study are available from the corresponding author upon reasonable request.

Additional information

Notes on contributors

Omar Rafae Alomar

Associate Prof. Dr. Omar Rafae Alomar (born in Mosul, Iraq, 1979) received B.Sc. and M.Sc. degrees in Mechanical Engineering from the Mosul University, Mosul, Iraq, in 2001 and 2004, respectively. In 2016, he received a PhD degree in Mechanical Engineering and Thermal Engineering from Institute of Thermal Engineering (IWTT), Technische Universität Bergakademie Freiberg (TU-BAF), Germany. From 2005 till date, he is working in the Mechanical Engineering Department, Northern Technical University, Mosul, Iraq as an Associate Prof. From 2011 to 2015, he received a DAAD fellowship. He has experience in CFD, phase change heat transfer, natural and forced convection within porous media, internal combustion engines, refrigeration and air conditioning systems, solar energy and fluid mechanics.

Hareth Maher Abd

Mr. Hareth Maher Abd (born in Mosul, Iraq, 1982) received B.Sc. in Refrigeration and Air-conditioning Technology from Northern Technical University in 2004 and M.Sc. degrees in Mechanical Engineering from the Mosul University, Mosul, Iraq, in 2012. From 2006 till date, he is working in Mechanical Engineering Department, Northern Technical University, Mosul, Iraq as a Lecturer. He has experience in refrigeration and air conditioning systems, solar energy and fluid mechanics.

Husam Naufal Saleh Yassien

Mr. Husam Naufal Saleh Yassien (born in Mosul, Iraq, 1983) received B.Sc. in Refrigeration and Air-conditioning Technology from Northern Technical University in 2005 and M.Sc. degrees in Mechanical Engineering from Eastern Mediterranean University, in 2012. From 2006 till date, he is working in Mechanical Engineering Department, Northern Technical University, Mosul, Iraq as a Lecturer. He has experience in refrigeration and air conditioning systems, solar energy and fluid mechanics.