A numerical and experimental investigation on the coefficients of discharge and the spray cone angle of a solid cone swirl nozzle

Halder, M.; Dash, Sukanta Kumar; Som, S. K.

doi:10.1016/s0894-1777(03)00110-9

Cited by 51 publications

(29 citation statements)

References 18 publications

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“…Earlier numerical investigation done by Datta and Som [4] have found that with the increase in the liquid flow rate at its lower range there occurs a sharp increase in spray cone angle but it become independent at the high range of flow rate (Q > 1 ×10 5 m 3 s −1 ). This result is in agreement with the work of Halder, Dash and Som [3]. They observed that the spray cone angle remain almost constant with the Reynolds number of the flow at inlet to the injector.…”

Section: Laryea and Nosupporting

confidence: 92%

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Spray cone angle and air core diameter of hollow cone swirl rocket injector

Abdul Hamid

2011

IIUMEJ

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: Fuel injector for liquid rocket is a very critical component since that small difference in its design can dramatically affect the combustion efficiency. The primary function of the injector is to break the fuel up into very small droplets. The smaller droplets are necessary for fast quiet ignition and to establish a flame front close to the injector head, thus shorter combustion chamber is possible to be utilized. This paper presents an experimetal investigation of a mono-propellant hollow cone swirl injector. Several injectors with different configuration were investigated under cold ï¬‚ow test, where water is used as simulation fluid. This investigation reveals that higher injection pressure leads to higher spray cone angle. The effect of injection pressure on spray cone angle is more prominent for injector with least number of tangential ports. Furthermore, it was found that injector with the most number of tangential ports and with the smallest tangential port diameter produces the widest resulting spray. Experimental data also tells that the diameter of an air core that forms inside the swirl chamber is largest for the injector with smallest tangential port diameter and least number of tangential ports.ABSTRAK : Injektor bahan api bagi roket cecair merupakan satu komponen yang amat kritikal memandangkan perbezaan kecil dalam reka bentuknya akan secara langsung mempengaruhi kecekapan pembakaran. Fungsi utama injektor adalah untuk memecahkan bahan api kepada titisan yang amat kecil. Titisan kecil penting untuk pembakaran pantas secara senyap dan untuk mewujudkan satu nyalaan di hadapan, berhampiran dengan kepala injektor, maka kebuk pembakaran yang lebih pendek berkemungkinan dapat digunakan. Kertas kerja ini mebentangkan satu penyelidikan eksperimental sebuah injektor ekabahan dorong geronggang kon pusar. Beberapa injektor dengan konfigurasi berbeza telah dikaji di bawah ujian aliran sejuk, di mana air digunakan sebagai bendalir simulasi. Kajian ini mendedahkan bahawa suntikan bertekanan tinggi menghasilkan sudut semburan kon yang besar. Kesan tekanan suntikan ke atas sudut semburan kon lebih ketara pada injektor yang mempunyai lubang tangen yang kurang Tambahan pula, injektor yang mempunyai jumlah lubang tangen yang paling banyak dan lubang tangen berdiameter paling kecil menghasilkan semburan yang paling lebar. Data eksperimental juga menunjukkan bahawa diameter teras udara terbesar terhasil di dalam kebuk pusar injektor yang mempunyai diameter lubang tangen terkecil dan jumlah lubang tangen yang paling kurang.

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Section: Laryea and Nosupporting

confidence: 92%

“…It is noted that in the hollow cone spray, the concentration of droplets is at the outer edge with little or no fuel at the center. Hollow cone spray injector has a wide application in spacecraft injector [3]. This paper summarizes injector testing effort that evaluated a swirl injector using water as the working fluid.…”

Section: Introductionmentioning

confidence: 99%

Spray cone angle and air core diameter of hollow cone swirl rocket injector

Abdul Hamid

2011

IIUMEJ

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“…A correlation to predict the angle of dispersion should be a strong function of the insertion depth, which increases with the increase of pressure. The plot also shows that an increase in pressure leads to a wider spreading or angle of dispersion, which agrees with previous work (Yule and Widger, ; Halder et al ., ; Kohnen et al ., ; Hamid et al ., ).…”

Section: Resultsmentioning

confidence: 99%

Influence of a Fixed Water Dispersion Device on Jet Dispersion and Range From an Impact Sprinkler

Issaka

Jiang

et al. 2019

Irrigation and Drainage

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Fixed water dispersion breaks up and disperses the jet issuing from the nozzle of an impact sprinkler continuously upon impingement. The performance of an impact sprinkler is influenced by the spatial distribution of the dispersed droplets. The objective of this study was to investigate the influence of a fixed water dispersion device on jet dispersion and range from an impact sprinkler. A series of experiments were conducted using high‐speed photography technology to capture images for analysis. A model of the jet was developed and applied in a MatLab computation program to determine the initial jet breakup lengths and the angles of dispersion. Comparison of the calculated values with other formulas indicated an average relative error of less than 10%. The spreading angle was wider with increased working pressure and insertion depth in the jet stream from the device. A semi‐empirical formula of spray range for the test sprinkler with a fixed water dispersion device was established through curve fitting. Because the new formula depends on the angle of dispersion, it may be useful as a simple and quick way to estimate the dispersion and uniformity of water distribution within the area irrigated. © 2019 John Wiley & Sons, Ltd.

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“…The most important geometric parameters include the diameter of the inlet and the orifice, the diameter of the swirl chamber, the length-to-diameter ratio of the orifice, and the height-to-diameter ratio of the swirl chamber [5,14]. Modification of the orifice is also important (e.g., using arcs or slants) [15][16][17][18][19]. The dynamic viscosity of the liquid is of great importance for the spray angle.…”

Section: Introductionmentioning

confidence: 99%

Effect of Rheological Properties of Aqueous Solution of Na-CMC on Spray Angle for Conical Pressure-Swirl Atomizers

2020

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Aerosol is a multiphase system, created as a result of the dispersion of a liquid in a gaseous medium. The atomized liquids are most often water and fuel; however, they can be any other substance. Even a small addition of a substance that changes the rheological properties (i.e., the nature of the flow) can change the properties of the resulting aerosol. The most important parameters that characterize the aerosol are the outflow rate, the droplet diameter, the spray spectrum, and the spray angle. The latter is important when selecting atomizers, especially those working in groups on the sprayer boom. The spray angle is an important parameter of the atomization process, providing a great deal of information about the quality of the spray. This study presents the results of rheological tests and the atomization of aqueous solutions with varying concentrations of sodium carboxymethylcellulose (Na-CMC). We found that the spray angle decreased with increasing Na-CMC concentration in the solution, which is attributable to an increase in shear viscosity. The design of the atomizer is also important. The largest spray angles were obtained for an atomizer with a diameter of 0.02 m and with the inlet port being placed at an angle to the atomizer axis. Based on the experimental results for various liquids and atomizer designs, a correlation equation describing the spray angle is proposed.

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A numerical and experimental investigation on the coefficients of discharge and the spray cone angle of a solid cone swirl nozzle

Cited by 51 publications

References 18 publications

Spray cone angle and air core diameter of hollow cone swirl rocket injector

Spray cone angle and air core diameter of hollow cone swirl rocket injector

Influence of a Fixed Water Dispersion Device on Jet Dispersion and Range From an Impact Sprinkler

Effect of Rheological Properties of Aqueous Solution of Na-CMC on Spray Angle for Conical Pressure-Swirl Atomizers

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