Document Type
Thesis
Date of Award
9-30-1983
Degree Name
Master of Science in Mechanical Engineering - (M.S.)
Department
Mechanical Engineering
First Advisor
P. Hrycak
Second Advisor
Herbert H. Spencer
Third Advisor
Martin J. Linden
Abstract
Experimental investigation was carried out on a circular, submerged, axisymmetric turbulent air jet-with normal impingement on a smooth, flat, square lucite plate, The flow was considered to be incompressible because the velocity of the jet was not too high, with Mach Number of the order of 0.3. Three nozzle diameters of 0.375" (9,525 mm), 0.250" (6.35 mm) and 0.125" (3.175 mm) were used with Reynolds number ranging from 7,000 to 70,000.
Various flow parameters were measured to obtain the velocity and pressure distributions at the surface of the flat lucite plate and along the centerline of the normal impinging air jet.
Impinging jets have the same characteristics as free jets, except near the target plate, The flow profile in the deflection zone and the wall jet zone were analyzed experimentally and the results found to conform with the works of previous investigators. Experimental investigation of the maximum velocity decay also was found to be in good agreement with previous investigators. At the stagnation point the present results show a better agreement with the theory than the previous ones.
Also, measurements of the boundary layer thickness at the stagnation point and in the wall jet region have been carried out, analyzed, and found to be compatible with the results of previous investigators. Additionally, the skin friction coefficient in the inner layer has been investigated experimentally by the Clauser's method.
Recommended Citation
Basu, Saibal, "Experimental investigation of an axisymmetric air jet impinging on a flat plate" (1983). Theses. 3500.
https://digitalcommons.njit.edu/theses/3500
