Design And Performance Study Of Doom Of Coaxial Staged Combustion Chamber

With the development of industry,reducing the emission of pollutants has be COme the primary task at present.How to achieve better COmbustion performance and lower emission at the same time has be COme a major topic for engineers developing industrial gas turbine.The design of a good cyclone swirler is the most important to achieve the low emission target.The traditional design method requires repeated trial calculation and iteration,which is time-COnsuming and laborious.Based on the lean premixed COaxial fractional COmbustion tech NOlogy,traditional empirical formula and fluid dynamics theory,this paper proposes a new design method and program of advanced swirl mixing integrated COmbustor doom.Through a lot of simulation,the performance of the model COmbustor is studied,and ac COrding to the research results,a kind of actual low-emission industrial gas turbine COmbustor that meets the design requirements is designed.The main work is as follows:(1)through the enthalpy method to determine the mainstream,COoling and mixing with gas.In this paper,the design of the Towel swirler is discussed in a new way,and the traditional design process is upgraded.Through some deserved k NOwn COnditions and the desired flow field effect,a set of design flow of the swirl mixing integration doom of the low-emission gas turbine COmbustor is presented and the program is presented.(2)Through the above program,a large number of Towel swirlers with different flow field indexes are generated and the COld and hot state performance of the COrresponding model COmbustor is numerically simulated.Aiming at the type cyclone designed in this paper,the influence of all levels of swirl number from 0.6 to 0.9 and flow ratio of different stages on the change of COmbustion flow field was studied to form a data curve,and the results were tested,evaluated and analyzed to summarize the rule of influence of structural parameter changes on the flow field.Selecting the best from a large number of structures,the optimum cyclone swirler for the current design COndition is obtained.(3)The selected cyclone was matched with the prototype COmbustor,and the prototype COmbustor was redesigned and optimized.By removing the main COmbustion hole,adjusting the flow distribution,adding the baffle ring and adjusting the mixing hole,the clean and low-emission premixed COmbustion of the doom,solving the problem of fuel spilt,reducing the emission and other tasks were realized.Finally,the optimal COmbustor structure of advanced low-emission natural gas turbine is obtained by analyzing and summarizing the rules of different structures.