Ghaffar, "Effect of inlet slot number on the spray cone angle and discharge coefficient of swirl atomizer," Procedia Engineering, vol.
Fang, "Effect of viscosities on structure and instability of sprays from a swirl atomizer," Experimental Thermal and Fluid Science, vol.
Morad, "Spray characteristics of a liquid-liquid coaxial swirl atomizer at different mass flow rates," Aerospace Science and Technology, vol.
The variation of mean drop size and droplet distribution with axial distance in a spray generated by pressure swirl atomizer can be show in function of ambient air pressure and velocity, liquid injection pressure, and initial mean drop size and distribution [4,5].
Design Procedure and experimental evaluation of Pressure swirl atomizer, In 24th International Congress Of The Aeronautical Sciences (ICAS 2004).
Internal Flow Characteristics of Simplex Swirl Atomizers. Journal of Propulsion Power, 1(3): 193-199.
The basic dimensions of pressure swirl atomizer are given in Figure 1.
However, Pedro et.al  from the experimental investigations on pressure swirl atomizer has suggested the increase in spray cone angle with increase in injection pressure.
The pressure swirl atomizer is designed and developed for tubular combustion chamber of micro gas turbine engine with spray cone angle of 60[degrees], 90[degrees] and 120[degrees].
In a simple pressure swirl atomizer (Giffen and Muraszew 1953; Lefevbre 1983, 1989; Bayvel & Orzechowski 1993; Ramamurthi & Tharakan 1995, 1998), swirling motion is imparted to the liquid inside the atomizer by passing it through a swirling chamber, which results in a tangential velocity component in the flow.
This paper describes the design methodology for pressure swirl atomizer of tubular type combustion chamber for micro gas turbine.
Extensive literature is devoted to design methods for pressure swirl atomizer. There are two main approaches to this calculation.