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RISEffects of Rib Design on the Unsteady Tip Heat Transfer Amplitude for a Turbine Rotor Blade
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: By solving the unsteady Reynolds-averaged Navier–Stokes equations and SST k–ω turbulence model, effects of rib design on the unsteady tip heat transfer amplitude for a turbine rotor blade with different rotating speeds are ...
A Comparison of Static and Rotordynamic Characteristics for Two Types of Liquid Annular Seals With Parallelly Grooved Stator/Rotor
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Liquid annular seals with parallelly grooved stator or rotor are used as replacements for smooth plain seals in centrifugal pumps to reduce leakage and break up contaminants within the working fluid. Parallelly grooved ...
Influence of Annular/Pocket Groove on the Static and Rotordynamic Characteristics of Hole-Pattern Seals
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Annular damper seals, such as hole-pattern seals, are widely used to control leakage and enhance rotordynamic stability in turbomachinery, especially, for the balance-piston seal in the straight-through multistage centrifugal ...
Robustness Analysis on Aerothermal Performance of the Winglet Squealer Tip—Part 1: Aerodynamic Performance
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Accurately assessing the robustness of the aerothermal performance of the blade tip is important considering that uncertainty is inevitable in the actual operation of turbines. However, the conventional uncertainty ...
A Comparison of Static and Rotordynamic Characteristics for Three Types of Impeller Front Seals in a Liquid Oxygen Turbopump
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Annular seals are widely used to minimize the leakage, and improve efficiency and rotordynamic stability in turbomachinery. In a liquid oxygen turbopump, the operating conditions of annular seals are harsher with the ...
Numerical Investigation on the Leakage and Rotordynamic Characteristics for a Hole-Pattern Seal in Wet-Gas Conditions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: For turbomachinery working in wet-gas conditions, liquid-phase fluid may worsen the rotordynamic characteristic of an annular seal, which induces a subsynchronous vibration problem and destabilizes the rotor-bearing system. ...
An Investigation of the Tapered Strut on Aerodynamic Performance of the Exhaust Diffuser Under Different Swirls
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The strut structure directly affects the flow-field characteristics and aerodynamic performance of the gas turbine exhaust diffuser. Based on verifying the reliability of the numerical method, the exhaust diffuser with ...
Rotordynamic Characteristics of the Straight-Through Labyrinth Seal Based on the Applicability Analysis of Leakage Models Using Bulk-Flow Method
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Labyrinth seals are widely applied in the turbomachinery to control the leakage flow through the clearance between stationary and rotating components. The fluid excitation induced by the labyrinth seal would deteriorate ...
Static and Rotordynamic Characteristics for Supercritical Carbon Dioxide Spiral Groove Dry Gas Seal With the Tilted Seal Ring
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Supercritical carbon dioxide (SCO2) Brayton cycle has been widely used as a substitute for traditional steam cycles. As one of the key components of power-dense turbomachines, dry gas seal (DGS) has been considered one of ...
Sensitivity Analysis of the Static and Rotordynamic Characteristics on Geometric Parameters for a Supercritical Carbon Dioxide Hole-Pattern Damper Seal
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Hole-pattern damper seal (textured stator with numerous circular-hole cavities and smooth rotor) is a typical annular damper seal that is gradually used in modern turbomachinery as a replacement of the conventional labyrinth ...