Improved Design Of Combustion Chamber Of Hydrogen-fired Turbine Range Extender And Research On Supporting Combustion Technology

As an alternative energy source,hydrogen has many advantages compared with traditional fossil fuels,such as zero pollution emission,low calorific value and renewability.As a newly developed thermal power generation device,the hydrogen-burning turbine range extender,i.e.,the hydrogen-burning micro gas turbine,has great application advantages in many fields,so it has received great attention and attention.It is estimated that there is a great space for technological innovation in the fields of distributed power generation,micro range extender and portable power generation,and it has become one of the mainstream energy technology development in this century.Combustion chamber is one of the core components of hydrogen-burning turbine extender,and its structure and performance directly affect the working characteristics of the whole system.Therefore,the configuration design of combustion chamber and the analysis of hydrogen-burning technology are of great significance to the in-depth study of the whole system of hydrogen-burning turbine extender.Firstly,this paper discusses the research background,significance and basic technical characteristics of hydrogen-burning turbine range extender,summarizes the research situation of micro-combustion chamber design and hydrogen-burning technology at home and abroad,and the main research contents of this paper;Then the hydrodynamics of hydrogen-air combustion and the reaction mechanism of hydrogen-air combustion are introduced.On the basis of hydrogen-air combustion theory,according to the system structure requirements and parameter settings,the main components such as flame tube,nozzle,cyclone and nozzle are designed and calculated,and the main components are modeled and assembled by Solidworks;Fluent is used to simulate the flame tube with different bending angles,and it is determined that the minimum outlet temperature of the flame tube is 992.3K and the NO concentration is kept at a low level of 41.4ppm when the angle is50°.Then,the combustion simulation of the flame tube with different mixing hole arrangement is carried out,and the temperature is obtained when the mixing hole arrangement is 2(number of rows)×8(number of holes per row)×10(diameter)The outlet temperature is the most uniform,and the NO concentration at the outlet is 27.4ppm.Finally,after determining the structure model of the flame holder,the influence of excess air coefficient on combustion is comparatively studied by setting different excess air coefficients.It is concluded that when the excess air coefficient is 2.5-3,the combustion efficiency of the flame holder is about 98%,the NO concentration at the outlet is between 25.6 ppm and 37.6 ppm,and the temperature distribution coefficient at the outlet is about 0.35.Finally,the combustion chamber improvement scheme and matching combustion scheme are obtained.