98 research outputs found
Flow characteristics of an air jet impinging on a flat surface
Survey develops adequate heat transfer correlations for design use. Flow characteristics studies include - potential core length, velocity and pressure distribution through the jet, and spread of jet and velocity decay along jet axis
Experimental flow characteristics of a single turbulent jet impinging on a flat plate
Flow characteristics of single circular turbulent jet impinging on flat plate
Cooling of gas turbines VIII : theoretical temperature distributions through gas turbine with special blades and cooling fins on the rim
Analysis of spanwise temperature distribution in three types of air-cooled turbine blade
Methods for computing spanwise blade-temperature distributions are derived for air-cooled hollow blades, air-cooled hollow blades with inserts, and air-cooled blades containing internal cooling fins. Individual and combined effects on spanwise blade-temperature distributions of cooling-air and radial heat conduction are determined. In general, the effects of radiation and radial heat conduction were found to be small and the omission of these variations permitted the construction of nondimensional charts for use in determining spanwise temperature distribution through air-cooled turbine blades. An approximate method for determining the allowable stress-limited blade-temperature distribution is included, with brief accounts of a method for determining the maximum allowable effective gas temperatures and the cooling-air requirements. Numerical examples that illustrate the use of the various temperature-distribution equations and of the nondimensional charts are also included
Exact solutions of laminar-boundary-layer equations with constant property values for porous wall with variable temperature
Exact solution of the laminar-boundary-layer equations for wedge-type flow with constant property values are presented for transpiration-cooled surfaces with variable wall temperatures. The difference between wall and stream temperature is assumed proportional to a power of the distance from the leading edge. Solutions are given for a Prandtl number of 0.7 and ranges of pressure-gradient, cooling-air-flow, and wall-temperature-gradient parameters. Boundary-layer profiles, dimensionless boundary-layer thicknesses, and convective heat-transfer coefficients are given in both tabular and graphical form. Corresponding results for constant wall temperature and for impermeable surfaces are included for comparison purposes
Exact solutions of laminar-boundary-layer equations with constant property values for porous wall with variable temperature
Coolant pressure and flow distribution through an air-cooled vane for a high temperature gas turbine
Coolant pressure and flow distribution through air cooled vane for high temperature gas turbin
A method for determining core dimensions of heat exchanger with one dominating film resistance and verification with experimental data
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