Natural-model tests of materials and coatings in simulated intense radiant and convective heat transfer of elements of heat and power equipment. Part 2: Physical and technical characteristics of thermal stand for testing of materials and coatings of diesel engine thermally insulated combustion chamber

Abstract

The paper presents the basic physical and technical characteristics stand the heat, allow to carry out natural-model tests in a complex heat transfer. The authors showed that the preliminary stage of the test materials and coatings must be preceded by the traditional testing of individual units with insulated elements on the motor stands. The developed stand allows to generate a combined heat flux with simulation of frequency and phase shifts of radiant and convective components corresponding to indicator diagrams of diesels in their operating conditions. The authors consider the methodology of forming a model of the emission spectrum of incandescent soot particles in the range of ~ 0.8-1.5 microns with the magnitude of the heat flux up to ~ 2.1 MW/m 2 in given area of irradiated surface of diesel engine combustion chamber. The proposed testing methodology can be used to study the temperature and thermoradiation fields of thermally loaded parts of engines, turbines, aerospace units of various thermal power plants and systems.

Keywords

combustion chamber / radiation-convective heat transfer / natural-model tests / simulation of the spectrum and flux / indicator diagram / heat stand / insulating materials and coatings

RIGHTS & PERMISSIONS

Merzlikin V.G., Maximov A.D., Tovstonog V.A., Chirin K.V., Abdulmyanov R.N.