CONTROL OF CARBON BUILDUP ON THE FLANKS OF THE FUEL NOZZLES OF TV3-117 ENGINE IN OPERATION
This article deals with the problem of identifying the carbon buildup on the flanks of the fuel nozzles of TV3-117 engines in operation and the number of carbonized nozzles on the basis of the diagnostic indicators. The article considers one of the diagnostic indicators, which is the difference in fuel pressure before nozzles at constant fuel consumption compared between the values obtained in acceptance tests and actual values obtained in engine tests. Instead of testing the engine, a mathematical calculation may be carried out using available records of the parameter values listed in the log book of the engine. The pressure difference should show the degree of carbon buildup and the number of carbonized nozzles provided that the sensors are installed on all twelve TV3-117 engine nozzles. The article suggests the methods for determining the degree of overlap of the exit section of the fuel nozzles with the overlap of air distribution holes of the swirler without removing the engine from the aircraft, on the helicopter base. Also, the article provides a brief description of the reasons for carbon buildup and suggests the solutions to the problem of carbon buildup, one of which is a traditional and up to date issued of alternative fuels. In this article, the alternative fuel is understood as the condensed aviation fuel containing the minimum values of sulfur compounds.