基于正交法扁双P型辐射管仿真模拟及结构优化

在扁形双P型辐射管的基础上,研究了扁双P型辐射管的中心管的等效半径、支管的等效半径、中心管和支管间距、管长等结构尺寸对辐射管性能的影响.通过建立正交试验方案对辐射管结构尺寸以及燃烧器喷口结构位置进行优化.结果表明,影响辐射管表面温差的最明显因素依次:中心管与支管的间距、中心管等效半径、管长和支管等效半径;影响辐射管辐射功率的明显因素依次:管长、中心管等效半径、中心管与支管的间距和支管的等效半径.上下空气喷口与左右空气喷口大小比例在7:3和9:1比较接近,辐射管的性能参数最好;左右空燃气喷口间距为50 mm,上下空气喷口间距在60 mm的情况下辐射管表面的温度不均匀系数最小,为0.058.

Simulation and structural optimization of flat double-P type radiant tubes based on the orthogonal method

The effects of structural dimensions such as central tube equivalent radius, branch tube equivalent radius, tube spacing, and tube length on the performance of a flat double-P type radiant tube were studied in this paper. The structural dimensions of the radiant tube and the positions of the burner nozzles were optimized using an orthogonal experimental program. It is shown that obvious influencing factors on the surface temperature difference of the radiant tube are tube spacing, central tube equivalent radius, tube length, and branch tube equivalent radius in turn. However, significant influencing factors on the radiant power of the radiant tube are tube length, central tube equivalent radius, tube spacing, and branch tube equivalent radius in order. When the size ratio of the upper to lower air nozzle is 7:3 and the size ratio of the left to right air nozzle is 9:1, the performance parameters of the radiation tube are the best. When the distance between the air and fuel gas nozzle is 50 mm and the air nozzle distance is 60 mm, the uneven coefficient of the radiation tube's surface temperature is the smallest at 0.058.