Experimental Investigation And Statistical Analysis Of The Pressur Atomizing Nozzle On A Heavy Gas Turbine

The current situation and development of the gas-turbine and its injectors at home and abroad is comprehensively examined in this paper. On the basis of home ground gas-turbine studying and practical application, some characteristics of the fuel injectors in R0110 Heavy gas-turbine have been investigated here. By means of rounded testing of R0110 injector group, fuel-supplying performances, spray cone angle changing characters, droplet size and its distributions law have been obtained. While, more conclusions have been gained as follows in this testing investigation: the fuel flow of 8 nozzles keep stable under the same fuel-supplying pressure, its maximum non-homogeneous degree is generally less than 3.5%.The total fuel flow of the injector group and the fuel flow of the single injector increase with the increasing fuel-supplying pressure. With lower pressure, the fuel flow increases faster, but when the fuel-supplying pressure goes more on rising, its fuel flow rate increases slowly. It implies that the relationship of the fuel flow rate-pressure fit basically the law of m f～?p.For R0110 pressure atomization injector, Sauter Mean Diameter (SMD) of the liquid drop size decreases along with the operating pressure increasing, and it is approximately invariable when the pressure increases to some extent, its SMD is about 11μm, the size distributions of the liquid drop are similar. The spray cone angle changing is very little with the fuel-supplying pressure changing. In the same fuel pressure, there are some deviations for the spray cone angles of various injectors in the injector group. A simple relation between the fuel-supplying pressure and SMD has been obtained, by fitting of SMD data in the atomization tests, which represents basically an atomization quality of R0110 injector group, and offers a reference formula for technical estimation(its estimation error is less than 5%). These testing and statistical analysis results can give important basic data for R0110 rig running, gas-turbine injector's improvement, and they have some practical value.