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Review on Main Equations for Measuring Spray Properties in Centrifugal Injectors

Ali Kamranpey

Abstract


The method of fuel injection has a significant effect on the stability and proper mixing of fuel and oxidizer, which is done by the injector. In other words, the injector is a device that converts fluid into droplets. The faster and better the particle crushing rate, the faster the fluid particles will evaporate, resulting in higher thermal efficiency and higher thrust force. Therefore, how to inject fuel into the combustion chamber is a very important issue in the combustion process, which due to the high complexity, the spray atomization process is somewhat unknown. Due to the fact that one of the most important types of injectors are centrifugal injectors, so in this article we try to address some of the main parameters of the atomization process such as spray cone angle, droplet diameter, etc. in this type of injectors. The name of this injector derives from the rotation of the liquid inside it. These injectors are divided into several categories, all of which in general guarantee a good particle size for medium and even small pressure drops. Because of this and their relatively simple design, centrifugal injectors are the most widely used of all injector types, including gas turbines and air conditioning systems. The results showed that the spray of centrifugal injectors is in the form of a hollow cone. Also, the total velocity and its components reach their maximum value on the edge of the spray cone. Studies have also shown that each of the geometric parameters has a very clear effect on the spray angle and discharge coefficient and droplet diameter.


Keywords


Centrifugal injector, Combustion, Spray cone angle, Droplet diameter, Discharge coefficient, Fluid film thickness.

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References


A.H. Lefebvre, Atomization and Sprays, Hemisphere Publishing Corporation, New York, 1989.

H.S. Couto, Jr. J.A. Carvalho, D. Bastos-Netto, Theoretical Formulation for Sauter Mean Diameter of Pressure-Swirl Atomizers, Journal of Propulsion and Power 13 (1987) Pp 691–696.

N. Dombrowski, W.R. Johns, The Aerodynamic Instability Disintegration of Viscous Liquid Sheets, Chemical Engineering Science 18 (1963) Pp 203–214.

V.G. Bazarov, V. Yang, Liquid-Propellant Rocket Engine Injector Dynamics, Journal of Propulsion and Power 14 (1998) Pp 797–806.

J.R. Paula Souza, Estudo de um Injetor Centrífugo Bipropelente utilizado em Motor Foguete a Propelente Líquido (Thesis in Portuguese), Instituto Tecnológico de Aeronáutica, São José dos Campos, Brazil, (2001).

A.R. Jones, Design Optimization of a Large Pressure Jet Atomizer for Power Plant, Proceedings of the 2nd International Conference on Liquid Atomization and Spray Systems, Madison, Wis., (1982).

A.H. Lefebvre, Gas Turbine Combustion. Hemisphere Publishing Corporation, New York, (1983).

Aminjan, K.K., Heidari, M., & Rahmanivahid, P. (2021). Study of spiral path angle in pressure-swirl atomizer with spiral path. Archive of Applied Mechanics, 91 (1), Pp 33–46.

Khani Aminjan, K., Kundu, B., & Ganji, D.D. (2020). Study of pressure swirl atomizer with tangential input at design point and outside of design point. Physics of Fluids, 32 (12), 127113.

Khani Aminjan, K., Heidari, M., Ganji, D.D., Aliakbari, M., Salehi, F., & Ghodrat, M. (2021). Study of pressure-swirl atomizer with spiral path at design point and outside of design point. Physics of Fluids, 33 (9).

Khani Aminjan, Kiumars and Heydari, Mohammad Mahdi and Valizadeh, Esmail, 2018, Numerical Analysis of the 3D Flow in Swirl Injector with Spiral Paths Computational Research Progress in Applied Science & Engineering, 4 (1),

Dorfner, V., Domnick, J., Durst, F., & Kohler, R. (1995). Viscosity and surface tension effects in pressure swirl atomization. Atomization and Sprays, 5 (3).

Choi, D.S., Kim, D.J., & Hwang, S.C. (2000). Development behavior of vaporizing sprays from a high-pressure swirl injector using exciplex fluorescence method. KSME international journal, 14 (10), Pp 1143–1150.

Jamali, M., Rostamijavanani, A., Nouri, N.M., & Navidbakhsh, M. (2020). An experimental study of cavity and Worthington jet formations caused by a falling sphere into an oil film on water. Applied Ocean Research, 102.

Dizadji, N., Najafi, M., Aliakbari, M., & Rashtchi, M. Experimental investigations of copper ions adsorption by nano-silica adsorbent from aqueous solutions, 21st International Congress of Chemical and Process Engineering CHISA 2014 Prague

Doustdar, M.M., & Aminjan, K.K. (2019). Modeling the Thrust and Specific Fuel Consumption for a Hypothetical Turbojet Engine. International Journal of IC Engines and Gas Turbines, 5 (1), Pp 45–52.

Aliakbari, M. (2017). Numerical Investigation of Heat Transfer of Nanofluids in a Channel under the Influence of Porous Area. Journal Of Fundamental And Applied Sciences, 9, Pp 1175–1188.

Aminjan, K.K., Rahmanivahid, P., & Heidari, M. Effects of Thermodynamic Parameters on Performance of Gas Turbine Cycle With Regenerator.

Dizadji, N., Najafi, M., Aliakbari, M., & Rashtchi, M. Experimental investigations of nickel ions adsorption by nano-silica adsorbent from aqueous solutions, 21st International Congress of Chemical and Process Engineering CHISA 2014 Prague

Parhrizkar, H., Aminjan, K.K., Doustdar, M.M., & Heydari, A. (2019). Optimization of S-Shaped Air Intake by Computational Fluid Dynamics. International Journal of Fluid Mechanics & Thermal Sciences, 5 (2), Pp 36.

Aminjan, K.K. (2018). A Review on the Change Process and the Evolution of Aircraft Engine Air Intake. International Journal of Mechanics and Design, 4 (1), Pp 15–22.

Rostamijavanani, A., Ebrahimi, M. R., & Jahedi, S. (2021). Thermal post-buckling analysis of laminated composite plates embedded with shape memory alloy fibers using semi-analytical finite strip method. Journal of Failure Analysis and Prevention, 21 (1), Pp 290-301.

Rostamijavanani, A., Ebrahimi, M.R., & Jahedi, S. (2021). Free vibration analysis of composite structures using semi-analytical finite strip method. Journal of Failure Analysis and Prevention, Pp1-10.

Aminjan, K.K., Heidari, M., Rahmanivahid, P., Alipour, H., & Khashehchi, M. (2021). Design and Simulation of Radial Flow Turbine Impeller and Investigation Thermodynamic Properties of Flow in LE and TE.

Ali Kamranpay, Alireza Mehrabadi, Numerical Analysis of NACA Airfoil 0012 at Different Attack Angles and Obtaining its Aerodynamic Coefficients, 2019. Journal of Mechatronics and Automation. 6 (3).

Heidari, M., Rahmanivahid, P., & Aminjan, K.K. (2020). Aerodynamic Analysis of Double Wedge Airfoil 16.5%@ 50% in Different Angle of Attack at Supersonic Flow. Solid State Technology, 63 (6).

Rostamijavanani, A. (2021). Dynamic buckling of cylindrical composite panels under axial compressions and lateral external pressures. Journal of Failure Analysis and Prevention, 21(1), Pp 97-106.

Aminjan, K.K. (2018). Aerodynamic Analysis of NACA 65–2012 Airfoils at Different Attack Angles with Computational Fluid Dynamics (CFD) Method. International Journal of Mechanical Handling and Automation, 4 (2), Pp 9–16.

Mahmoodi, M., & Aminjan, K.K. (2017). Numerical simulation of flow through sukhoi 24 air inlet. Computational Research Progress in Applied Science & Engineering (CRPASE), 3.

Pouria Akbari, Study of NACA 6212 Airfoil and Investigation of its Aerodynamic Properties in Different Angles of Attack, International Journal of Mechanical Dynamics & Analysis, 7 (1). 1 (2021)

Aziz, A.A., & Ali, M.F. (2006). Numerical investigation on the needle-shape of hollow-cone pressure-swirl type gasoline direct injector (No. 2006-01-1002). SAE Technical Paper.

Doumas, M., & Laster, R. (1953). Liquid-film properties for centrifugal spray nozzles. Chemical Engineering Progress, 49 (10), Pp 518–526.

Dombrowski, N., & Hasson, D. (1969). The flow characteristics of swirl (centrifugal) spray pressure nozzles with low viscosity liquids. AIChE Journal, 15 (4), Pp 604–611.

K. Ranganadha Babu, M.V. Narasimhan, and K. Narayanaswamy, “Correlations for prediction of discharge rate, core angle and air core diameter of swirl spray atomizers,” Int. J. Turbo Jet Engines 7 (3–4), Pp 235–243 (1990).

Dombrowski, N., & Wolfsohn, D.L. (1972). The atomization of water by swirl spray pressure nozzles. Trans. Instn. Chem. Engrs, 50, Pp259.

Baranaev, M.K., & Tenyakov, V.I. (1970). Centrifugal injector droplet size over a wide range of dispersant properties. Fluid Dynamics, 5 (3), Pp 492–499.

Montazeri, M.J., & Jafargholi, A. (2007). Improving the droplet prediction model in pressure-swirl injectors based on the study of the dynamics of the spraying phases. In the Fifteenth Annual (International) Conference on Mechanical Engineering ISME2007. Amirkabir University of Technology (in Persian), Tehran.

T. Inamura, H. Tamura, and H. Sakamoto, “Characteristics of liquid film and spray injected from swirl coaxial injector,” J. Propul. Power 19 (4), Pp 632–639 (2003).

M. Suyari and A.H. Lefebvre, “Film thickness measurements in a simplex swirl atomizer,” J. Propul. Power 2 (6), Pp 528–533 (1986).


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