A procedure for the design of radial cascade diffusers based on the maximum ratio between flow deflection and total pressure loss coefficient

Pavesi, Giorgio; Cavazzini, Giovanna; Rossetti, Antonio; Ardizzon, Guido

doi:10.1243/09576509jpe643

Cited by 1 publication

(2 citation statements)

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“…Pampreen 3 provided some results from experience with the use of a cascade in the design of diffuser for the centrifugal compressor and could predict the performance at design and off-design conditions using cascade data. A design procedure for radial cascade diffusers for incompressible flow, based on the maximum ratio between the flow deflection and the total pressure loss coefficient, was proposed by Pavesi et al 4 The useful design charts of a diffuser were provided and validated by the test cases, and the results had a satisfactory agreement. Rossetti et al 5 presented a multi-objective optimum design procedure aimed at achieving the best compromise between flow deflection, static pressure recovery, and total pressure loss for aerodynamic diffusers.…”

Section: Introductionmentioning

confidence: 99%

“…A design procedure for radial cascade diffusers for incompressible flow, based on the maximum ratio between the flow deflection and the total pressure loss coefficient, was proposed by Pavesi et al. 4 The useful design charts of a diffuser were provided and validated by the test cases, and the results had a satisfactory agreement. Rossetti et al.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of the diffuser in a centrifugal pump by combining response surface method with multi-island genetic algorithm

Wang

Yuan

Pei

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part E:

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The diffuser plays a significant role in the performance of a centrifugal pump, especially for a high-power centrifugal pump. Therefore, to improve the efficiency of a centrifugal pump, optimization of a vaned diffuser is proposed in this work. The steady simulations were carried out by solving the three-dimensional Reynolds-averaged Navier-Stokes equations with a shear stress transport turbulence model. The numerical head and efficiency were validated by the experimental results of the original pump, and the results show that the predicted performance of the numerical simulation is in good agreement with the experimental results. Four design variables of the diffuser including the diffuser inlet diameter D 3 , diffuser inlet width b 3 , diffuser inlet angle 3 , and diffuser wrap angle ' 2 were selected to design by the CFturbo 9.0. The diffusers under test were selected using the orthogonal experiment method using the orthogonal array L 16 (4 4). The effect of the four variables on the pump's efficiency was investigated by the predicted efficiency of 16 diffusers. A quadratic polynomial fitting function for the variables and efficiency was constructed using the response surface method. The optimal values were obtained by solving the response function with the multi-island genetic algorithm. Through the analysis of the range and quadratic regression, it was found that the diffuser wrap angle has the most significant influence on efficiency. The efficiency of the optimal pump increased by 8.65% compared with the original scheme. The velocity distributions in the diffuser inlet and volute were improved and became more uniform. The total pressure in the diffuser and volute of the optimal pump was higher than that of the original pump.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%