Design and construction of the pressure swirl nozzle and experimental investigation of spray characteristics

Seyedin, Seyed Hadi; Ahmadi, Majid; Seyedin, Seyed Vahid

doi:10.31803/tg-20180908135420

Cited by 6 publications

(1 citation statement)

References 17 publications

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“…Seyedin et al studied pressure swirl nozzle. Their study showed that by increasing the distance of the droplets from the centre of the spray cone, the velocity of the output drops decreases due to the friction effect near the wall of the nozzle's orifice [20].…”

Section: Introductionmentioning

confidence: 99%

Estimating Spray Characteristics of the Air-Blast atomizer of a Typical Jet Engine using Definition of the New Non-dimensional Number K: Numerical and Experimental Study

et al. 2022

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In this paper, by using a numerical solution and experiment investigation, a non-dimensional number is introduced to estimate the characteristics of a real engine airblast atomizer spray. This type of atomizers is usually used in airplain engines. The test is conducted in ambient atmospheric pressure and at 300 K temperature and the effects of pressure on atomizer flow rate and spray con angle are investigated. We used the discrete phase model and real information of the ALF502 engine for simulations and for boundary conditions respectively. Since the main application of this airblast atomizer is in aircraft engines and in the real working conditions, none of the pressure and flow rate parameters is constant, thus, the main aim of this research is to define a nondimensional number K, which considers the effects of working liquid flow rate, air flow rate and pressure on the droplets average diameter and spray con angle simultaneously. The results showed that, in general, with the increase of non-dimensional K number, the average diameter of droplets in primary and secondary break up increases, but spray con angle decreases. Furthermore, numerical solution results are compared with experiment results and 9.98% error was observed.

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Section: Introductionmentioning

confidence: 99%

Estimating Spray Characteristics of the Air-Blast atomizer of a Typical Jet Engine using Definition of the New Non-dimensional Number K: Numerical and Experimental Study

et al. 2022

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Experimental investigation of spray cooling heat transfer with microcapsule phase change suspension

Zhang,

Zhu,

Liu

et al. 2024

International Journal of Heat and Mass Transfer

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Study of pressure-swirl atomizer with spiral path at design point and outside of design point

Aminjan

Heidari²,

Ganji

et al. 2021

Physics of Fluids

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Studies on pressure-swirl atomizers have mainly focused on pressure-swirl atomizers with tangential input while there are limited studies on pressure-swirl atomizers with a spiral path. This study applies experimental and computational methods to provide a better understanding of flow development in this type of atomizer at the design point and outside the design point. Experimental results showed that as the pressure increases, the spray cone angle increases. This increase initially occurs with a higher slope and then the slope is toned down. While the drainage coefficient remains constant, the droplet diameter decreases as the pressure increases. It is observed that similar to the pressure-swirl atomizer with tangential input, the pressure-swirl atomizer with a spiral path has a conical hollow spray. At the constant mass flow rate, as the spiral path cross-section, the length of the swirl chamber and orifice diameter increase, the fluid film thickness and average diameter of droplets increase while the spray cone angle reduces. Further, increasing the number of spiral paths causes a wider spray cone angle, higher discharge coefficient, larger fluid film thickness, and larger droplet diameter. The results also showed that increasing the length of the orifice marginally affected the properties of the spray while significantly reducing the spray cone angle. It is important to note that the numerical results are in good agreement with the experimental data.

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Design and construction of the pressure swirl nozzle and experimental investigation of spray characteristics

Cited by 6 publications

References 17 publications

Estimating Spray Characteristics of the Air-Blast atomizer of a Typical Jet Engine using Definition of the New Non-dimensional Number K: Numerical and Experimental Study

Estimating Spray Characteristics of the Air-Blast atomizer of a Typical Jet Engine using Definition of the New Non-dimensional Number K: Numerical and Experimental Study

Experimental investigation of spray cooling heat transfer with microcapsule phase change suspension

Study of pressure-swirl atomizer with spiral path at design point and outside of design point

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