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Showing 1 to 20 of 40 for “"transonic turbine"”.
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Flowfield measurements in a transonic turbine
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1995.
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Development of a transonic turbine cascade facility
… describes the design and initial testing of a transonic turbine cascade facility. It is specifically concerned with the best way to obtain flow periodicity and repeatability through the cascade by the use of tailboards at the cascade exit. The problem of how to achieve flow periodicity and …
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Experimental and numerical investigation of transonic turbine cascade flow
… a two-dimensional cascade of the high pressure turbine blades of a jet engine is presented. The main interest is the measurement and prediction of the mass-averaged total pressure losses. Other experiments, such as flow visualization, are aimed at the validation of the code that was used to …
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Fluid flow and heat transfer in transonic turbine cascades
… and thermodynamic performance of an aircraft gas turbine directly affects the fuel consumption of the engine and the life of the turbine components. Hence, it is important to be able to understand and predict the fluid flow and heat transfer in turbine blades to enable the modifications and …
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Unsteady shock wave effects on transonic turbine cascade performance
… assessment of unsteady shock wave effects on turbine blade performance has been developed. A novel shock-generation system utilizing a shotgun blast has been implemented into the Virginia Tech Wind Tunnel Transonic Cascade Facility. Specialized optical systems and high-performance pressure …
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Evaluation of a Heat Flux Microsensor in a Transonic Turbine Cascade
… (HFM) versus an HFM deposited directly on a turbine blade to measure heat flux in a transonic cascade are investigated. The HFM is a thin-film sensor, 6.35 mm (0.250") in diameter (for an insert gage, including the housing) which measures heat flux and surface temperature. The thermal time …
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Measurements of pressure and thermal wakes in a transonic turbine cascade
… and total temperature in the wake of a cooled transonic turbine cascade with heated flow are presented in this thesis. The experiment was conducted in the Virginia Tech Cascade Wind Tunnel. A dual hot wire aspirating probe was used to make high frequency, unsteady total pressure and temperature …
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Toward CFD-based correlations for a single-stage high-pressure transonic turbine
… importance in the preliminary design of a gas turbine engine. They are useful to determine the efficiency and thus the Specific Fuel Consumption (SFC of the engine, before even having blade geometries. Also, correlations play a very. important role in the understanding of the behavior …
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Steady and Unsteady Heat Transfer in a Film Cooled Transonic Turbine Cascade
… waves emerging from the trailing edge of modern turbine nozzle guide vanes and impinging on downstream rotor blades is modeled in a linear cascade. The Reynolds number based on blade chord and exit conditions (5*10^6) and the exit Mach number (1.2) are representative of modern engine operating …
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On-line data acquisition and instrumentation improvements for the transonic turbine test rig.
The Transonic Turbine Test Rig located in the Turbo-Propulsion Laboratory of the Naval Postgraduate School is used to analyze axial turbine stage performance. The Test Rig is designed to separately measure stator and rotor losses without the use of velocity or pressure surveys. Various stator and …
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Effects of multiple incident shock waves on the flow in a transonic turbine cascade
Turbine aerodynamic designers are currently focusing on unsteady passage flow to increase turbine performance. In particular, for high pressure turbine stages the effects of wakes and shocks shed from an upstream blade row on the downstream blade row need to be understood. Also, experimental data …
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The effect of blade solidity on the aerodynamic loss of a transonic turbine cascade
… Tech (VPI) explored the aerodynamic loss of the transonic VPI turbine blade, which 1s based on the pitchline profile of a high pressure turbine blade for a large commercial aircraft gas turbine. The current experiment explores the loss of the VPI blade for different axial solidity ratios near the …
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An Investigation of Heat Transfer Coefficient and Film Cooling Effectiveness in a Transonic Turbine Cascade
… heat transfer coefficient of a two-dimensional turbine rotor blade in a linear transonic cascade. Experiments were performed in Virginia Tech's Transonic Cascade Wind Tunnel with an exit Mach number 0f 1.2 and an exit Reynolds numbers of 5x106 to simulate real engine flow conditions. The …
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Effects of shock wave passing on turbine blade heat transfer in a transonic turbine cascade
… a blade passage on surface heat transfer to turbine blades were measured experimentally. The experiments were performed in a transonic linear cascade which matched engine Reynolds number, Mach number, and shock strength. Unsteady heat flux measurements were made with Heat Flux Microsensors on …
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An experimental determination of the trailing-edge base pressure on blades in transonic turbine cascades
… pressure and its approximate distribution on a transonic turbine blade. Since the base pressure plays an important role in determining the profile loss on blades with thick trailing edges, both the base pressure and the blade losses are presented for a range of transonic exit Mach numbers. The …
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Experimental Study of the Heat Transfer on a Squealer Tip Transonic Turbine Blade with Purge Flow
… rotor blade without purge flow cooling, under transonic conditions and high inlet free stream turbulence intensity. The blade design was provided by Solar Turbines Inc., and consists of a double squealer around the pressure and suction sides, two purge flow blowing holes located downstream of …
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Effects of High Intensity, Large-Scale Freestream Combustor Turbulence On Heat Transfer in Transonic Turbine Blades
… of the flow downstream of a modern gas turbine combustor and first stage vane on turbine blade heat transfer has been measured and analytically modeled in a linear, transonic turbine cascade. Measurements were performed on a high turning, transonic turbine blade. The facility is capable …
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