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Development of a chemical simplex of deposit formationon the walls of the fuel supply channels of engines and power plants

The article describes a theoretical research related to development of a new simplex of deposit formation. This simplex differs from the existing similarity criteria and heat transfer simplices in that it is chemical and consists of the mass fractions of some fuel components, a metal wall and deposits. The problem of the formation of carbon-containing deposits on the heated walls of the fuel supply channels of power plants and engines is considered in detail. The main conditions for the occurrence of carbon-containing deposit and its properties, as well as its dependence on many factors, including temperature, number of cycles, the presence of additives in fuel, etc., are shown. For some thermophysical properties of deposits in different engines real data are given, as well as data on metals-catalysts and metals-inhibitors of oxidation and sedimentation. The obtained chemical simplex can be successfully used when creating new heat transfer criterion equations that would be much more accurate and applied for the following determination of heat transfer coefficients in fuel supply channels of engines and power plants.