Multi-Disciplinary Optimization Design of Axial-Flow Pump Impellers Based on the Approximation Model

Shi, Lijian; Zhu, Jie; Tang, Fangping; Wang, Chuan

doi:10.3390/en13040779

Cited by 78 publications

(56 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, the W-A model can accurately simulate the unsteady characteristics of an oblique submerged impinging jet. When the value of n was 7, the velocity distribution calculated by Formula (8) was approximately consistent with the velocity distribution of a fully developed circular jet [29]. As shown in Figure 4, the numerical calculation results with different turbulence models are in good agreement with the empirical formula.…”

Section: Verification Of the Wray-agarwal Turbulence Modelsupporting

confidence: 64%

“…With the improvement of computer performance, computational fluid dynamics technology provides a low-cost and high-efficiency solution to the complex problems in water conservancy engineering [8][9][10], municipal engineering [11,12], and other practical projects. Many scholars use Computational Fluid Dynamics (CFD) technology to study the flow field of an impinging water jet.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Unsteady Numerical Calculation of Oblique Submerged Jet

et al. 2020

Self Cite

View full text Add to dashboard Cite

A water jet is a kind of high-speed dynamic fluid with high energy, which is widely used in the engineering field. In order to analyze the characteristics of the flow field and the change of law of the bottom impact pressure of the oblique submerged impinging jet at different times, its unsteady characteristics at different Reynolds numbers were studied by using the Wray–Agarwal (W-A) turbulence model. It can be seen from the results that in the process of jet movement, the pressure at the peak of velocity on the axis was the smallest, and the velocity, flow angle, and pressure distribution remain unchanged after a certain time. In the free jet region, the velocity, flow angle, and pressure remained unchanged. In the impingement region, the velocity and flow angle decreased rapidly, while the pressure increased rapidly. The maximum pressure coefficient of the impingement plate changed with time and was affected by the Reynolds number, but the distribution trend remained the same. In this paper, the characteristics of the flow field and the law of the impact pressure changing with time are described.

show abstract

Section: Verification Of the Wray-agarwal Turbulence Modelsupporting

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Unsteady Numerical Calculation of Oblique Submerged Jet

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…With the rapid development of computational fluid dynamics (CFD) technology, many scholars have applied CFD to solve complex problems encountered in engineering such as turbomachinery [10][11][12][13][14]. At the same time, some scholars have conducted a lot of research on vertical submerged impinging water jets through CFD.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of the Normal Impinging Water Jet at Different Impinging Height, Based on Wray–Agarwal Turbulence Model

et al. 2020

Self Cite

View full text Add to dashboard Cite

As a kind of water jet technology with strong impinging force and simple structure, the submerged impinging water jet can produce strong scouring action on subaqueous sediments. In order to investigate the flow field characteristics and impinging pressure of submerged impinging water jets at different impinging heights, the Wray-Agarwal (W-A) turbulence model is used for calculation. The velocity distribution and flow field structure at different impinging heights (1 ≤ H/D ≤ 8), and the impinging pressure distribution at the impingement plate under different Reynolds numbers (11, 700 ≤ Re ≤ 35100) are studied. The results show that with the increase of the impinging height, the diffusion degree increases and the velocity decreases gradually when the jet reaches the impingement region. The fluid accelerates first and then decelerates near the stagnation point. The maximum impinging pressure and the impinging pressure coefficient decrease with the increase of the impinging height, but the effective impinging pressure range remains unchanged. In this paper, the distribution characteristics of the impinging pressure in the region of the impingement plate at different heights are clarified, which provides theoretical support for the prediction method of the impinging pressure.

show abstract

“…In the field of fluid machinery, some scholars use pure simulation methods to study its performance index (Shi et al, 2020a;Shi et al, 2020b;Wang et al, 2020a;Wang et al, 2020b), some scholars adopt the method of combining simulation methods with experiments (Wang et al, 2018;Shi et al, 2020), and this study adopts the method of direct experiment.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on Transient Characteristics of a Nuclear Reactor Coolant Pump in Coast-Down Process Under Power Failure Condition

et al. 2020

View full text Add to dashboard Cite

In order to study the transient characteristics of a nuclear reactor coolant pump in coastdown process under power failure condition, a transient test device for the nuclear reactor coolant pump is set up. This study investigates the effects of the rotor of the nuclear reactor coolant pump and the circuit characteristics on the nuclear reactor coolant pump during the coast-down process by changing the rotary inertia of the flywheel and the resistance of the pipe system. The results show that the greater the moment of inertia is, the more slowly rotational speed, flow, and lift get down in the same coast-down period. The change in the pipe resistance has little effect on the rate of decline in the coast-down process, but it has a great influence on the descent speed of the flow rate and lift. When the pipe resistance is small, the corresponding flow rate decreases faster, but it is slower for the corresponding lift. The results are of great significance in controlling the stability and reliability of the nuclear reactor coolant pump in the coast-down process.

show abstract

Multi-Disciplinary Optimization Design of Axial-Flow Pump Impellers Based on the Approximation Model

Cited by 78 publications

References 28 publications

Unsteady Numerical Calculation of Oblique Submerged Jet

Unsteady Numerical Calculation of Oblique Submerged Jet

Numerical Study of the Normal Impinging Water Jet at Different Impinging Height, Based on Wray–Agarwal Turbulence Model

An Experimental Study on Transient Characteristics of a Nuclear Reactor Coolant Pump in Coast-Down Process Under Power Failure Condition

Contact Info

Product

Resources

About