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Download Steam and Gas Turbine by R Yadav PDF for Free: A Guide

Non-condensable gases are removed from the steam-dry air mixture by a venturi at the entrance to the test section. There are two aluminium pass-through tubes, the top one to measure static pressure and the bottom one to measure total pressure. These are fixed on the bottom plate of the mixing duct by using insulated threaded rods. Nucleating steam is sprayed from a nozzle placed with a height of 7cm, 1m from the tip of the cascade. Steam is injected in the duct at an adjustable flow rate. Different ratios of dry air and steam can be controlled using a butterfly valve. The mixing process is captured by two cameras inside the duct to record the flow field at the entrance and at the outlet. Relative humidity of the spray is measured using a hygrothermometer placed at the outlet of the duct. The following methods are used to study the flow field and the dynamic properties of the cascade flow: 1) pressure measurements in the mixing duct, 2) flow visualization using a twin-fluorescent gun, and 3) pressure velocity field using four probe velocity probes with insertion depth of 3 mm. The flow field is captured by two cameras through which the pressure data is analysed. The velocity field is retrieved using the gas correlation method. The pressure field is reconstructed using the pressure probe data and the pressure gradient obtained from the camera. Non-condensable gases are removed using a venturi at the entrance of the duct. By using a calibrated venturi and measuring the static pressure, the static pressure drop due to the venturi can be calculated. Static pressure is measured from 8 static pressure taps placed on the side plate and on the bottom plate of the duct. This is measured after an initial burst of steam in the duct. Static pressure at the inlet and outlet of the test section is obtained from static pressure taps on the side plate. steam and gas turbine by r yadav pdf download The paper presents details of a unique experimental facility along with necessary accessories and instrumentation for testing steam turbine cascade blades in wet and nucleating steam. A steam turbine rotor tip cascade is chosen for flow investigations. Cascade inlet flow measurements show uniform conditions with dry air and steam and dry air mixture of different ratios. Exit flow surveys indicate that excellent flow periodicity is obtained. Blade surface static pressure and exit total pressure distributions are also presented with dry air and with steam and dry air mixture of different ratios as the working medium at an exit Mach number of 0.52.

steam and gas turbine by r yadav pdf download


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