Three Dimensional Flows And Loss Generation Mechanisms In A Linear Turbine Rotor Cascade At Various Incidence Conditions
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Endwall Flow/loss Mechanisms in a Linear Turbine Cascade with Blade Tip-clearance
Author | : A. Yamamoto |
Publisher | : |
Total Pages | : 0 |
Release | : 1988 |
Genre | : Cascades (Fluid dynamics) |
ISBN | : |
Aerodynamic Measurements of a Variable-speed Power-turbine Blade Section in a Transonic Turbine Cascade
Author | : Ashlie B. Flegel |
Publisher | : |
Total Pages | : 56 |
Release | : 2013 |
Genre | : Cascades (Fluid dynamics) |
ISBN | : |
Abstract: The purpose of this thesis is to document the impact of incidence angle and Reynolds number variations on the 3-D flow field and midspan loss and turning of a 2-D section of a variable-speed power-turbine (VSPT) rotor blade. Aerodynamic measurements were obtained in a transonic linear cascade at NASA Glenn Research Center in Cleveland, OH. Steady-state data were obtained for ten incidence angles ranging from +15.8° to -51.0°. At each angle, data were acquired at five flow conditions with the exit Reynolds number (based on axial chord) varying over an order-of-magnitude from 2.12 × 105 to 2.12 × 106. Data were obtained at the design exit Mach number of 0.72 and at a reduced exit Mach number of 0.35 as required to achieve the lowest Reynolds number. Midspan total-pressure and exit flow angle data were acquired using a five-hole pitch/yaw probe surveyed on a plane located 7.0 percent axial-chord downstream of the blade trailing edge plane. The survey spanned three blade passages. Additionally, three-dimensional half-span flow fields were examined with additional probe survey data acquired at 26 span locations for two key incidence angles of +5.8° and -36.7°. Survey data near the endwall were acquired with a three-hole boundary-layer probe. The data were integrated to determine average exit total-pressure and flow angle as functions of incidence and flow conditions. The data set also includes blade static pressures measured on four spanwise planes and endwall static pressures.