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RISOn the Mechanism of Spike Stall Inception and Near Stall Nonsynchronous Vibration in an Axial Compressor
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The aerodynamic and aeroelastic behavior of an engine-like transonic compressor stage is investigated in this paper. Simulations were carried out for the transonic compressor at the Technical University of Darmstadt using ...
Experimental Analysis of the Interaction Between Rim Seal and Main Annulus Flow in a Low Pressure Two Stage Axial Turbine
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The spoiling effects of rim seal flow are studied at the Large Scale Turbine Rig (LSTR) at Technische Universitأ¤t Darmstadt. Detailed flow field measurements and efficiency measurements were performed for various ingress ...
Measurements of Radial Vortices, Spill Forward, and Vortex Breakdown in a Transonic Compressor
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The phenomena prior to rotating stall were investigated in a high-speed compressor test rig using optical and pneumatic measurement techniques. A number of throttling procedures were performed at transonic and subsonic ...
Uncertainty Propagation Analyses of Lean Burn Combustor Exit Conditions for a Robust Nozzle Cooling Design
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Knowing the flow conditions at the combustor turbine interface is a key asset for an efficient cooling design of high-pressure turbines. However, measurements and numerical predictions of combustor exit conditions are ...
Investigation of the Interaction Between Tip Leakage and Main Annulus Flow in the Large Scale Turbine Rig: Comparison of Different Rotor Tip Geometries
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Shroudless rotor blades are state-of-the-art in modern high pressure turbines. Tip leakage flow has a crucial impact on turbine efficiency. Specific blade tip designs are a key factor to handle tip leakage losses by ...
Film Cooling and Thermal Performances of a Blade Tip Winglet Operated in an Annular Test Rig and a Test Gas Turbine Power Plant
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper investigates the film cooling performances and thermal behavior of a blade tip winglet, which was initially investigated in a 1.5-stage experimental axial turbine facility and subsequently also tested in a gas ...
The Effect of Unsteady Inlet Boundary Conditions on the Aero-Thermal Behavior of High-Pressure Turbine Vanes – A Numerical Study Using Scale-Resolving Simulations
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents the application of a novel method to prescribe unsteady boundary conditions to transient, scale-resolving computational fluid dynamics simulations of the high-pressure turbine in modern jet engines. The ...
Unsteady Measurements of Periodic Effects in a Transonic Compressor With Casing Treatments
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Application of nonaxisymmetric casing treatments (CTs) can extend the operating range of a transonic compressor significantly. Recent CT designs have proven successful at achieving operating range extension without efficiency ...
Influence of Channel Geometry and Flow Variables on Cyclone Cooling of Turbine Blades
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A study examining the internal cooling of turbine blades by swirling flow is presented. The sensitivity of swirling flow is investigated with regard to Reynolds number, swirl intensity, and the common geometric features ...
Blade Triggered Excitation of Periodically Unsteady Impinging Jets for Efficient Turbine Liner Segment Cooling
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In the present study, an application for efficient cooling of turbine liner segments employing pulsating impinging jets was investigated. A combined numerical and experimental study was conducted to evaluate the design of ...