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RISEffect of URANS and Hybrid RANS-Large Eddy Simulation Turbulence Models on Unsteady Turbulent Flows Inside a Side Channel Pump
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this work, the unsteady Reynolds-averaged Navier–Stokes (URANS) and three hybrid Reynolds-averaged Navier–Stokes-large eddy simulation (RANS-LES) models are employed to resolve the vortical flows in a typical single-stage ...
A Pressure Model for Open Rotor–Stator Cavities: An Application to an Adjustable-Speed Centrifugal Pump With Experimental Validation
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: For a centrifugal pump, the interaction between the leakage and the pressure profile in the side chambers is crucial to the performance and reliability of the pump. However, existing theoretical models for directly predicting ...
Numerical Flow Prediction in Inlet Pipe of Vertical Inline Pump
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: For a pump, the inlet condition of flow determines the outlet conditions of fluid (i.e., energy). As a rule to minimize the losses at the entry of pump, the bends should be avoided as one of the methods. But for the case ...
Multi-Objective Shape Optimization on the Inlet Pipe of a Vertical Inline Pump
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Vertical inline pump is a single-stage single-suction centrifugal pump with a bent pipe before the impeller, which is usually used where installation space is a constraint. In this paper, with three objective functions of ...
Hydraulic Performance Assessment of Sprinkler Irrigation with Rotating Spray Plate Sprinklers in Indoor Experiments
Publisher: American Society of Civil Engineers
Abstract: A recently developed rotating spray plate sprinkler (RSPS) with a six-grooved plate (R 3) is evaluated in this paper. A set of nozzles numbered 15/128 in. (2.98 mm), 17/128 in. (3.37 mm), and 19/128 in. ...
Multi-Objective Shape Optimization on the Inlet Pipe of a Vertical Inline Pump
Publisher: American Society of Mechanical Engineers (ASME)
Abstract: Vertical inline pump is a single-stage single-suction centrifugal pump with a bent pipe before the impeller, which is usually used where installation space is a constraint. In this paper, with three objective functions of ...
Experimental and Numerical Evaluation of Affinity Law of Single-Stage and Multistage Side Channel Pumps at Variable Rotating Speeds
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In the actual operation of pumps, regulating the rotating speed of the pump based on the affinity law through variable speed drives is deemed as a prudent and convenient approach to mitigate energy loss. However, the ...
Dynamic Characterization of Vortex Structures and Their Evolution Mechanisms in a Side Channel Pump
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: To obtain a better insight into the unsteady flow behavior in side channel pumps by a robust vortex identification method, this study presents the efficacy of the new Ω-criterion in characterizing the evolution of vortex ...
Unsteady Simulation and Analysis of Energy Loss Mechanism of a Vertical Volute Pump Under Stall Conditions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This study comprehensively investigates the flow features and energy loss mechanisms under stall conditions based on computational fluid dynamics (CFD) and hydraulic loss visualization techniques. The three-dimensional ...
Lagrangian Analysis of Unsteady Partial Cavitating Flow Around a Three-Dimensional Hydrofoil
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This study employs an incompressible homogeneous flow framework with a transport-equation-based cavitation model and shear stress transport turbulence model to successfully reproduce the unsteady cavitating flow around a ...