Abstract
The experimental development of power facility for advance researches and model almost full-scale tests of new heat-resistant material materials and coatings for complex heat transfer in the engine combustion chambers is shown. Increasing effectiveness and reduction emissions of toxic gases for high-speed diesel engines for a long period of operation are an urgent problem. This predetermines the development of thermal barrier materials, including opaque (semitransparent) heat-insulating coatings under the influence unsteady-state convective and radiate heat exchange in the combustion chamber. Designed stand provides simulated convective and radiate heat flux components taking into account coordination its frequencies and phase differences. Model emission spectrum corresponds to thermal radiation of red-hot soot particles in the range ~ 0.8 – 1.5 μm and heat flux value to ~ 2 MW/m2 at given areas of the exposed surface. Testing numerous classes and types of materials and coatings under actual conditions of diesel engines operation is a costly and time-consuming process. Preliminary tests of model samples of heat-insulating coatings using stand modeling of radiant and convective heating will allow considerably to simplify and improve the selection methodology of the advanced heat-resistant materials and coatings. The proposed methodology testing of materials and fragments of combustion chamber is relevant to a transport objects, a variety of engines and turbines in the automotive, ship, aerospace and other transport and mechanical engineering industries.
KEYWORDS –stand modeling, corrected radiant spectrum, convection.