Plane Turbulent Wall Jet Research Articles

The Hydraulic Jump as a Well Jet

An attempt to study the mechanics of the hydraulic jump, treating it as a plane turbulent wall jet under adverse pressure gradient, is presented. Extensive measurements have been made regarding the pressure field, velocity distribution, and the boundary shear stress in the jump for nine supercritical Froude numbers from 2.68 to 9.78. It has been found that the pressure distribution is hydrostatic only in a narrow region near the bed. The velocity distribution in the forward flow is similar. The skin friction coefficient based on the supercritical velocity decreases monotonically with x/y2, in which x is the distance from the beginning of the jump and y2 is the subcritical sequent depth. A more accurate form of the momentum equation for the jump has been developed. Also, a method has been devised to predict the surface and energy profile in the jump.

Submerged Hydraulic Jump

This paper presents a study of the submerged hydraulic jump as the case of a plane turbulent wall jet under adverse pressure gradient with backward flow on top. Using the experimental results of the author for the forward flow and those of Liu and Henry for the backward flow, a method has been devised to predict the surface profile, and the fall of the pressure plus momentum and the energy in the submerged hydraulic jump. Also a study has been made of the boundary shear stress that was measured with a Preston tube.

Closure to “Discussion of ‘Heat Transfer to Plane Turbulent Wall Jets’” (1963, ASME J. Heat Transfer, 85, pp. 213–214)

Closure to “Discussion of ‘Heat Transfer to Plane Turbulent Wall Jets’” (1963, ASME J. Heat Transfer, 85, pp. 213–214)

Closure to “Discussion of ‘Plane Turbulent Wall Jet Flow Development and Friction Factor’” (1963, ASME J. Basic Eng., 85, pp. 53–54)

Closure to “Discussion of ‘Plane Turbulent Wall Jet Flow Development and Friction Factor’” (1963, ASME J. Basic Eng., 85, pp. 53–54)

Measurements of skin friction in a plane turbulent wall jet : A. Sigalla. Royal Aeronautical Society, Journal, v. 62, Dec. 1958, p. 873–877

Measurements of skin friction in a plane turbulent wall jet : A. Sigalla. Royal Aeronautical Society, Journal, v. 62, Dec. 1958, p. 873–877

Measurements of Skin Friction in a Plane Turbulent Wall Jet

SummaryResults of an experimental investigation of the distribution of skin friction along the wall of a plane turbulent wall jet are presented. The measurements show that it is possible to describe the variation of skin friction coefficient by a formula similar to the Blasius formula which is based on experimental results of turbulent pipe flow. This is simply achieved by considering the inner layer of fluid between the wall and the position where the velocity is a maximum as a boundary layer with an outer uniform free stream of velocity equal to the local maximum velocity.Other measurements of velocity distribution indicate that within the experimental range and accuracy, the velocity profiles in the jet are similar and that the rate of change of velocity and width of the jet can be expressed by simple power laws. These results are then partially compared with theory.