A study of fluid flow simulation in convergent-divergent nozzles

Olaru, Ionel

doi:10.1088/1757-899x/95/1/012048

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…Otros trabajos similares a este, que involucran simulación de toberas utilizando software comercial ANSYS Fluent y que no implementan un método de validación adicional a los resultados de CFD se presentan en [16], [17].…”

Section: B Estado Del Arteunclassified

Modelación de la distribución térmica en una tobera convergente-divergente utilizada en sistemas aeroespaciales

Alvarez-Montoya¹,

Sierra²,

Navia³

et al. 2019

Proceedings of the 17th LACCEI International Multi-Conference for Engineering, Education, and Technology: “Industry, Innovation

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A numerical mathematical model was developed to determine the behavior of thermal distribution in a convergentdivergent nozzle used in aerospace applications. This development was carried out by using the two-dimensional heat equation for describing the phenomenon, which was resolved by means of the finite difference method. In addition, it was considered insulated and flow boundary conditions, a structured mesh with, and a nodal density of 169. The methodology was implemented in MATLAB through an algorithm which allows variations in the geometry, nodal density, and inlet conditions. This methodology was validated using computational fluid dynamics (CFD). The validation demonstrated that the proposed methodology reduces the computational cost by having an execution time 1555 times less than CFD simulation time. The relative error between the methodology and the CFD results was 2,9 %. The proposed methodology would allow the preliminary design process of this type of nozzles by analyzing thermal distribution effectively and accurately.

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Section: B Estado Del Arteunclassified

Modelación de la distribución térmica en una tobera convergente-divergente utilizada en sistemas aeroespaciales

Alvarez-Montoya¹,

Sierra²,

Navia³

et al. 2019

Proceedings of the 17th LACCEI International Multi-Conference for Engineering, Education, and Technology: “Industry, Innovation

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“…Figure 2 shows the results of the simulation of the reference design. [10], [11] Figure2. Reference Design …”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of a Venturi Water Pump With Different Parts Variation

Ganas¹

2017

IJRASET

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The aim of the study is to determine the effects of varying the size of a specific part of Venturi water pump to the discharge volume flow rate and discharge head. A simulated design was fabricated as reference for the part variations. Tests were conducted on an experimental set-up where compressed air is supplied to a submerged Venturi water pump with a modified part. Discharge volume flow rates and heads were then measured and compared to the reference design test results. The obtained results demonstrated that when the chest diameter is increased the discharge volume flow rate also increased but the discharge head decreased. The effects were opposite when increasing both the pitot tube and throat lengths as the discharge flow rate decreased while the head increased. However, the results were fluctuating when changing the converging angle. Results presented in this paper can be of real use in the design and fabrication of Venturi water pumps for different applications. Further study should be made on variations of the converging angle to compare its discharge effect. Keywords: Venturi water pump, chest diameter, pitot tube length, converging angle, throat length. I.INTRODUCTION Venturi water pump has been widely used in the production and daily life due to its simple structure, reliable, and low-cost way to produce vacuum and considered an alternative to mechanical vacuum pumps.[1],[2] The efficiency of Venturi water pump is usually lower than that of conventional pumps but these accessories have some advantages over conventional pumps [3]. This water pump is based on the Venturi principle. The Venturi effect is the result of Bernoulli's principle of fluid dynamics, that is when the fluid is passing through the pipe and the pipe suddenly gets smaller, the fluid has to speed up to for the fluid behind it to keep moving at the same speed. It takes energy to accelerate, and the energy for the increased in speed comes from the force of pressure on the fluid. Since the energy is being used, the pressure has to decrease as the fluid accelerates. A decrease in pressure creates vacuum. The more speed the fluid has before it travels through the smaller section pipe, the faster it will have to go it once it enters, the pressure will drop, the greater the vacuum effect will be.[4]- [7] In terms of design, a Venturi water pump is a pumping device that uses an air compressor to supply pressure to converging suction which can create vacuum. The pressure difference creates a vacuum at suction where placed in water then this device is called a "water vacuum pump." Basic vacuum pump components are shown in Figure 1.[8], [9] In this paper, the researchers made different variations of those components considering that it can have an effect on the discharge performance of the device. A reference design was made so that for every component that was modified, all other parts were held fixed. This way the researchers were able to determine the relation of each altered component to the discharge condition namely: volume flo...

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A study of fluid flow simulation in convergent-divergent nozzles

Cited by 2 publications

References 4 publications

Modelación de la distribución térmica en una tobera convergente-divergente utilizada en sistemas aeroespaciales

Modelación de la distribución térmica en una tobera convergente-divergente utilizada en sistemas aeroespaciales

Performance Analysis of a Venturi Water Pump With Different Parts Variation

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