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RISUnsteady Investigation of Intermediate Turbine Ducts Under the Influence of Purge Flows
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The aerodynamic flow field at the outlet of a high-pressure turbine (HPT) stage in a modern turbofan engine is highly unsteady and strongly influenced by periodic fluctuations from the HPT rotor, also interacting with the ...
Aerodynamic Performance of Turbine Center Frames With Purge Flows—Part II: The Influence of Individual Hub and Tip Purge Flows
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The aerodynamic behavior of turbine center frame (TCF) ducts under the presence of high-pressure turbine (HPT) purge flows was experimentally investigated in this two-part paper. While the first part of the paper demonstrated ...
The Influence of Combustor Hot Streaks on the Aerodynamic Performance of a Turbine Center Frame
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper investigates the influence of combustor temperature non-uniformities on modern engine turbine center frames (TCFs). Due to their position in an engine, coupled with the trends of more aggressive designs, increased ...
The Interaction of Main Stream Flow and Cavity Flows in Turbine Center Frames and Turbine Vane Frames
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper focuses on the interaction between the last high-pressure turbine (HPT) stage purge flows and the intermediate turbine duct (ITD) in modern turbofan engines. Two state-of-the-art ITD concepts are analyzed in ...
Impact of Turbine-Strut Clocking and Turbine Outlet Swirl on the Heat Transfer and Film Cooling in an Aggressive Turbine Center Frame
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This study focuses on the thermal impact of the clocking position of the high-pressure turbine (HPT) vanes with respect to the turbine center frame (TCF) struts and the thermal impact of the HPT outlet swirl. The TCF is a ...
Impact of Blowing and Density Ratio on the Film Cooling and Heat Transfer in an Aggressive Turbine Center Frame
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: It was shown in the previous study that the aft purge flows from the last stage of the high-pressure turbine (HPT) have a significant film cooling potential in the downstream turbine center frame (TCF) (Jagerhofer et al., ...
The Influence of Purge Flow Parameters on Heat Transfer and Film Cooling in Turbine Center Frames
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The imperative improvement in the efficiency of turbofan engines is commonly facilitated by increasing the turbine inlet temperature (TIT). This development has reached a point where also components downstream of the ...
Impact of High-Pressure-Turbine Purge Flow on the Evolution of Turbulence in a Turbine Vane Frame
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper describes the measurement and postprocessing of turbulence data. The experiments were carried out in a two-stage, two-spool transonic turbine test rig at the Institute for Thermal Turbomachinery and Machine ...
Experimental and Numerical Comparison of Two Turbine Vane Frame Designs
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents an experimental study supported by numerical simulations of the performance of two turbine vane frames (TVFs) at various purge and TVF inlet swirl conditions representing both on- and off-design operations. ...
Aerodynamic Performance of Turbine Center Frames With Purge Flows—Part I: The Influence of Turbine Purge Flow Rates
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This two-part paper deals with the influence of high-pressure turbine (HPT) purge flows on the aerodynamic performance of turbine center frames (TCF). Measurements were carried out in a product-representative one and a ...