Search
CSV
RISPrediction of Ingestion Through Turbine Rim Seals—Part I: Rotationally Induced Ingress
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The mainstream flow past the stationary nozzle guide vanes and rotating turbine blades in a gas turbine creates an unsteady nonaxisymmetric variation in pressure in the annulus, radially outward ...
Prediction of Ingestion Through Turbine Rim Seals—Part II: Externally Induced and Combined Ingress
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Ingress of hot gas through the rim seals of gas turbines can be modeled theoretically using the so-called orifice equations. In Part I of this two-part paper, the orifice equations were derived ...
Thermodynamic Analysis of Buoyancy-Induced Flow in Rotating Cavities
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Buoyancy-induced flow occurs in the rotating cavities between the adjacent disks of a gas-turbine compressor rotor. In some cases, the cavity is sealed, creating a closed system; in others, ...
Buoyancy-Induced Flow in a Heated Rotating Cavity
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Experimental measurements were made in a rotating-cavity rig with an axial throughflow of cooling air at the center of the cavity, simulating the conditions that occur between corotating compressor ...
Computation of Flow Between Two Disks Rotating at Different Speeds
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Disks rotating at different speeds are found in the internal cooling-air systems of most gas turbines. Defining Γ as the ratio of the rotational speed of the slower disk to that of the ...
Prediction of Ingress Through Turbine Rim Seals—Part II: Combined Ingress
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In Part I of this two-part paper, the orifice equations were solved for the case of externally induced (EI) ingress, where the effects of rotational speed are negligible. In Part II, the ...
Buoyancy-Induced Flow in Open Rotating Cavities
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Buoyancy-induced flow can occur in the cavity between the co-rotating compressor disks in gas-turbine engines, where the Rayleigh numbers can be in excess of 1012. In most cases the cavity is ...
Influence of Fluid Dynamics on Heat Transfer in a Preswirl Rotating-Disk System
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Modern gas turbines are cooled using air diverted from the compressor. In a “direct-transfer” preswirl system, this cooling air flows axially across the wheel space from stationary preswirl ...
Physical Interpretation of Flow and Heat Transfer in Preswirl Systems
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper compares heat transfer measurements from a preswirl rotor–stator experiment with three-dimensional (3D) steady-state results from a commercial computational fluid dynamics (CFD) code. The ...
Rayleigh-Bénard Convection in Open and Closed Rotating Cavities
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Buoyancy effects can be significant in the rotating annular cavities found between compressor discs in gas-turbine engines, where Rayleigh numbers above 1012 are common. In some engines, the ...