Analysis and classification of droplet characteristics. Numerical simulation of the internal flow of swirl atomizer under. The design of pressure swirl atomizers sciencedirect. Effect of geometric parameters on the spray cone angle in the pressure swirl injector. Experiments and modeling of discharge characteristics in watermist sprays generated by pressure swirl atomizers 14 november 2012 journal of thermal science, vol. Flat top cupcakes and swirls using favourite nozzles purple cupcakes. Among the most commonly found atomizer classes of designs are pressure swirl. Small pressureswirl atomizer for aircraft combustion chambers was run on a newly designed test bench with jet a1.
The pressure swirl atomizer, also known as simplex atomizer with its dimensions are shown in figure 1. Ae 276 exp 2 spray 27 january 2017 iisc spray from a. Pdf experimental investigation of a pressure swirl. These nozzles work by forcing a liquid under high pressure into a swirl chamber in which the fluid gains tangential momentum and exits through a small orifice or nozzle. Study on droplet size and velocity distributions of a pressure swirl. A fully nonlinear boundary element method bem model has been developed to simulate the pressure swirl or simplex atomizer. View lab report ae 276 exp 2 spray 27 january 2017 from ae 276 at iit kanpur. Mean drop sizes from pressureswirl nozzles journal of. A twodimensional swirl axisymmetric model based on the volume. A onedimensional wave equation, applicable to the waves on the surface of the aircore of a swirl atomizer is derived analytically, by analogy. Semiempirical correlation to predict the sauter mean diameter of the pressure swirl atomizer conference paper pdf available november 20 with 360 reads how we measure reads. Reitz, pressureswirl atomization in the near field, sae technical paper series, 1999010496. The free surface inside the vortex chamber and within the hollowconeprimary atomization zone is simulated with a fourth order scheme thereby permitting investigation of highly distorted surfaces up to the point where atomization occurs. Stationary rotary force waves on the liquidair core interface of a.
Pdf pressureswirl atomization in the near field researchgate. A thorough numerical, theoretical and experimental investigation of the liquid atomization in a full cone pressure swirl. Spray characteristics, such as dropsize and velocity distribution have a principal in. Twentythird symposium international on combustionthe combustion institute, 1990pp. Liquid swirling strength, weber number, gastoliquid axial velocity ratio and gas toliquid density ratio have different effects on droplet size and velocity distributions of a pressure swirl atomizer. Pdf semiempirical correlation to predict the sauter. This paper has focused on the behavior of kerosene jet a1 spray produced by commercial pressure swirl. Pressure swirl atomizers, also known as simplex atomizers, are used commonly in many industries, including aerospace, automotive, pharmaceuticals and others. Experimental investigation of a pressure swirl atomizer spray. Pdf to model sprays from pressureswirl atomizers, the connection between the injector and the downstream spray must be considered.
Schematics of pressure swirl atomizer 1 for some applications a spray in the form of a solid cone is preferred. Spray formation by a swirl spray jet in low speed crossflow. Atomizers find applications in diverse fields such as agriculture, pharmaceutics and combustion. Internal fuel distributions from pressureswirl atomizers. Computational evaluation of spray characteristics in. Effect of geometric parameters on the spray cone angle in the. Ingham university of leeds west yorkshire, leeds ls2 9jt, u. Spray cone angle affects the droplet distribution after atomization and is one of the main targets of coaxial gasliquid injector. Liquid atomization out of a full cone pressure swirl nozzle. Article information, pdf download for numerical simulation of the internal flow of swirl atomizer under ambient pressure. Nonlinear simulation of free surfaces and atomization in. Pdf spray structure of a pressureswirl atomizer for combustion.
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