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Flow and heat transfer conditions are investigated on rotating flat plates and on blades of tangential blowers. The solution of the three dimensional boundary layer equations for rotating flat plates show that 3-D effects are of influence only in the neighborhood of the axis of rotation. The conditions outside this region can be treated as flow in a 2-D system. The measurements indicate that turbulent...
A proposed apparatus for controlling temperatures from -190??C to +650??C with an estimated accuracy of 0.001??C is decribed. The apparatus utilizes helium as the heat transfer medium. An integral plus proportional controller is used. The selection of the gain constants of the controller depends upon the system parameters. The hypothetical case of a solid cylindrical block is considered, the differential...
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