Role of blade rotational angle on energy performance and pressure fluctuation of a mixed-flow pump

Tan, Lei; Yu, Zeting; Xu, Ye; Liu, Yabin; Cao, Shuai

doi:10.1177/0957650917689948

Cited by 89 publications

(24 citation statements)

References 24 publications

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“…We will take advantage of the TKE area integrals on SF_5mm to estimate the potential noise reduction ability of different designs. TKE is defined as the variance of the fluctuations in velocity [34,37], which is known as k in the k-ω-based SST turbulence model (Equations (4) and (5)) and can be written as:…”

Section: Evaluation Methods Of Aerodynamic and Aeroacoustic Performancementioning

confidence: 99%

“…In general, the industrial flow fans require improvement on the fluid dynamic performance and the working stability associated with the vibrations, noise, and unnecessary forces [3]. To this end, recent studies on the industrial pump mainly focus on the effects of its traditional design parameters on the fluid dynamic output or pressure fluctuations [4][5][6][7][8]. For example, the spanwise twist change may increase efficiency by 0.8% but cause larger pressure fluctuation amplitude [5].…”

Section: Introductionmentioning

confidence: 99%

“…To this end, recent studies on the industrial pump mainly focus on the effects of its traditional design parameters on the fluid dynamic output or pressure fluctuations [4][5][6][7][8]. For example, the spanwise twist change may increase efficiency by 0.8% but cause larger pressure fluctuation amplitude [5]. The tip clearance (TC) variations even within 0.5 mm can result in significant changes in efficiency and pressure fluctuation [7].…”

Section: Introductionmentioning

confidence: 99%

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Development of Mixed Flow Fans with Bio-Inspired Grooves

2019

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Mixed flow fan is a kind of widely used turbomachine, which has faced problems of further performance improvement in traditional design methods in recent decades. Inspired by the microgrooves such as riblets and denticles on bird feathers and shark skins, we here propose biomimetic designs of various blades with the bio-inspired grooves, aiming at the improvement of the aeroacoustic performance. Based on a systematic study with computational fluid dynamic analyses, we found that these designs had the potential in noise suppression even with macroscopic grooves. Our best design can suppress turbulence kinetic energy by approximately 38% at the blade leading edge with aerodynamic efficiency loss of only 0.3 percentage points. This improvement is achieved by passive flow control. The vortical structures are changed in a favorable way at the leading edge due to the grooves. We believe that these biomimetic designs could provide a promising future of enhancing the performance of mixed flow fans by making grooves of ideal flow passages on the suction faces of blades in accord with the theory of pump design.

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Section: Evaluation Methods Of Aerodynamic and Aeroacoustic Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Development of Mixed Flow Fans with Bio-Inspired Grooves

2019

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“…Two air flows moving in the opposite directions meet in this area of internal space and form a stagnant zone. The stagnant zone can shrink during the rotation due to the action of centrifugal forces [27][28][29][30][31].…”

Section: Verification Technique Approbationmentioning

confidence: 99%

Verification of Thermal Models of Internally Cooled Gas Turbine Blades

Shevchenko

Rogalev

et al. 2018

International Journal of Rotating Machinery

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Numerical simulation of temperature field of cooled turbine blades is a required element of gas turbine engine design process. The verification is usually performed on the basis of results of test of full-size blade prototype on a gas-dynamic test bench. A method of calorimetric measurement in a molten metal thermostat for verification of a thermal model of cooled blade is proposed in this paper. The method allows obtaining local values of heat flux in each point of blade surface within a single experiment. The error of determination of local heat transfer coefficients using this method does not exceed 8% for blades with radial channels. An important feature of the method is that the heat load remains unchanged during the experiment and the blade outer surface temperature equals zinc melting point. The verification of thermal-hydraulic model of high-pressure turbine blade with cooling allowing asymmetrical heat removal from pressure and suction sides was carried out using the developed method. An analysis of heat transfer coefficients confirmed the high level of heat transfer in the leading edge, whose value is comparable with jet impingement heat transfer. The maximum of the heat transfer coefficients is shifted from the critical point of the leading edge to the pressure side.

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“…With the development of computational fluid dynamics, more and more researchers predicted the internal flow and pressure fluctuation in pumps by numerical simulation. New calculation models and numerical methods have been developed and verified [3][4][5][6]. The results from numerical simulation can reveal detailed fluid information in impeller and volute, including pressure and streamline distributions, which are difficult to obtain in experiments.…”

Section: Introductionmentioning

confidence: 99%

Flow Characteristics in Volute of a Double-Suction Centrifugal Pump with Different Impeller Arrangements

et al. 2019

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As an important type of centrifugal pump, the double-suction pump has been widely used due to its high efficiency region and large flow rate. In the present study, the complex flow in volute of a double-suction centrifugal pump is investigated by numerical simulation using a re-normalization group (RNG) k-ε model with experimental validation. Axial flows are observed in volute near the impeller outlet and compared with four staggered angles. The net area-weighted average axial velocities decrease as the staggered angle increases. The axial flows are mainly caused by the different circumferential pressure distribution at the twin impeller outlet. The dominant frequencies of the axial velocities for different staggered angles are fBP and its harmonic. The pressure fluctuations in most regions of the volute are obtained by superimposing the pressure generated by the two impellers.

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Role of blade rotational angle on energy performance and pressure fluctuation of a mixed-flow pump

Cited by 89 publications

References 24 publications

Development of Mixed Flow Fans with Bio-Inspired Grooves

Development of Mixed Flow Fans with Bio-Inspired Grooves

Verification of Thermal Models of Internally Cooled Gas Turbine Blades

Flow Characteristics in Volute of a Double-Suction Centrifugal Pump with Different Impeller Arrangements

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