Experimental-analytical study of the occurrence of fuel splash through the air intake pipe of the emulsion atomizer
Authors: Niazbaev K.T., Ivchenkova I.A., Kudryavtsev V.A., Kudryavtsev A.V.
Published in issue: #7(127)/2022
DOI: 10.18698/2308-6033-2022-7-2194
Category: Aviation and Rocket-Space Engineering | Chapter: Thermal, Electric Jet Engines, and Power Plants of Aircrafts
The study centers around an injector with gas-dynamic fuel atomization, i.e. an emulsion atomizer, which is not widely spread as the operating processes inside its channel and at its outlet at critical values of gas pressures and temperatures are poorly studied. First, we analyzed experimental data on the study of the fuel splash from the air intake pipe of the emulsion atomizer at various values of the oncoming air flow and the geometrical parameters of the outlet openings of the atomizer and evaluated the splash in terms of the gas dynamics of air flows inside the atomizer. Then, we developed a model that described the conditions for a fuel splash to occur from the point of view of the kinematics of the drops’ movement, and attempted to physically justify why the model was preferable. Next, we applied an analytical method to obtain a characteristic complex that linked the fuel splash phenomenon with the operating modes and geometrical parameters of the fuel distribution device. Analytical calculations made it possible to summarize the available experimental data and to obtain a graphical dependence, showing the boundary of the occurrence of a fuel splash from the air intake pipe of the emulsion atomizer. Finally, we gave recommendations to prevent the occurrence of a splash.
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