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RISA Systematical Study of the Influence of Blade Number on the Performance of a Side Channel Pump
Publisher: American Society of Mechanical Engineers (ASME)
Abstract: For side channel machines, distinction is made between side channel pumps and peripheral pumps. The blade number of side channel machines has a large influence on the performance of the pump. This is known from several ...
A Simple Analytical Model for Head Estimation of Noncavitating Inducers With Arbitrary Shape
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Although the increase of suction performance is the primary objective when applying inducers to centrifugal pumps and the combined head of inducer and main impeller is finally to be judged, it is helpful for the designer ...
Numerical and Experimental Investigation of Streamlines for Tandem Impeller in a Centrifugal Pump
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Radial fluid machines with conventional impeller often lead to flow separation in the blade passage in case of high flow deflection. Tandem blades can be used to counteract this problem. Due to their properties, a new thin ...
Computational Fluid Dynamics Analysis of a Radial Turbine During Load Step Operation of an Automotive Turbocharger
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A method for evaluating the transient performance of a turbocharger (TC) is so-called load step tests. In these tests, the load of the engine is increased at constant engine speed and the time measured from the start to ...
Investigations of Inducers Operating With High Rotational Speed
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Suction performance, pressure rise, and efficiency for four different inducers are examined with computational fluid dynamics (CFD) simulations and experiments performed with 18,000 rpm and 24,000 rpm. The studies originate ...
Turbine Vane Endwall Film Cooling Effectiveness of Different Purge Slot Configurations in a Linear Cascade
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This study is concerned with the film cooling effectiveness of the flow issuing from the gap between the nozzle guide vane (NGV) and the transition duct on the NGV endwall, i.e., the purge slot. Different slot widths, ...
Experimental Investigation of Aerostatic Journal Bearings Made of Carbon Fiber-Reinforced Carbon Composites
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This study describes experimental results using carbon fiber-reinforced carbon (C/C) material for porous journal bearings under static conditions. Exerted radial forces of up to 90 N, a supply pressure of up to 6 bar, and ...
Comparison of Film Cooling Performance for Different Purge Slot Configurations in a Cylindrical and State-of-the-Art Nozzle Guide Vane
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This comparative study is concerned with the advances in nozzle guide vane (NGV) design developments and their influence on endwall film cooling performance by injecting coolant through the purge slot. This experimental ...
A Novel Method to Achieve Fast Multi-Objective Optimization of Hydrostatic Porous Journal Bearings Used in Hydraulic Turbomachine
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The hydrostatic journal bearing equipped with a carbon-fiber-reinforced carbon-based porous bushing is employed in the hydraulic turbomachine. The bearing exhibits high load capacity, but may unduly consume pressurized ...
Cavitation-Induced Unsteady Flow Characteristics in the First Stage of a Centrifugal Charging Pump
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Cavitation is the main factor that causes reliability problems in centrifugal charging pumps (CCPs) in nuclear power plants. In this study, the cavitation-induced unsteady flow characteristics of a CPR1000 CCP were ...