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Experimental study of the effects of secondary air on the emissions and stability of a lean premixed combustor

机译:二次空气对稀薄预混燃烧器排放和稳定性影响的实验研究

摘要

Tests were run using a perforated plate flameholder with a relatively short attached recirculation zone and a vee gutter flameholder with a relatively long attached recirculation zone. Combustor streamlines were traced in cold flow tests at ambient pressure. The amount of secondary air entrainment in the recirculation zones of the flameholders was determined by tracer gas testing at cold flow ambient pressure conditions. Combustion tests were caried out at entrance conditions of 0.5 MPa/630K and emission of NOx, CO and unburned hydrocarbons were measured along with lean stability and flashback limits. The degree of entrainment increases as dilution air injection decreases. Flashback appears to be a function of overall equivalence ratio and resistance to flashback increases with increasing combustor entrance velocity. Lean stability limit appears to be a function of both primary zone and flameholder recirculation zone equivalence ratios and resistance to lean blowout increases with increasing combustor entrance velocity.
机译:使用带有一个相对较短的回流区的多孔板火焰保持器和带有一个相对较长的回流区的V型槽火焰保持器进行测试。在环境压力下的冷流测试中追踪了燃烧器的流线。通过在冷流环境压力条件下进行的示踪气体测试,确定了火焰保持器再循环区域中二次空气的夹带量。在入口条件为0.5 MPa / 630K的条件下进行了燃烧试验,并测量了NOx,CO和未燃烧的碳氢化合物的排放以及稀薄稳定性和回火极限。夹带度随着稀释空气注入的减少而增加。闪回似乎是总当量比的函数,并且随着燃烧器入口速度的增加,对闪回的抵抗力也会增加。倾斜稳定性极限似乎是主要区域和火焰保持器再循环区域当量比的函数,并且随着燃烧器入口速度的增加,对稀薄喷射的阻力也增加。

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  • 作者

    Raman R. S. V.; Roffe G.;

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  • 年度 1981
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