Via the analysis of heat balance computation model and the computation of online heat balance for industrial coal boiler , this dissertation researched overall input heat , efficient utilized quantity of heat , heat losing of discharge flue gas , heat losing of chemistry and mechanism incomplete combustion , heat losing of dispelling heat of boiler , heat efficiency , air superfluous coefficient , wind speed , wind quantity , computation of primary air circle cutting and whose influence on boiler combustion efficiency 本文通过对工业煤粉锅炉热平衡计算模型的分析，利用在线热平衡计算，研究了总输入热、有效利用热量、排烟热损失、化学不完全燃烧热损失、机械不完全燃烧热损失、锅炉散热热损失、热效率、空气过剩系数、风速、风量及一次风切圆计算以及这些因素对锅炉燃烧效率的影响。
While the speed is very large , the fuel - air mixing behind the airstream is decreased and the span that the fuel flow in the second combustor is reduced , so the combustion efficiency is decreased , h ) if the fuel streams impinge with the airstreams directly at the air - inlet exit , it make against increasing the combustion efficiency , i ) increasing air - to - fuel ratio within proper range can increase the combustion efficiency 增加燃气喷射速度有利于增强回流区强度，头部燃烧温度上升，但速度太大则会减弱燃气同空气在进气道下游的掺混燃烧，减少燃气在室内停留时间，燃烧效率降低； 8燃气射流与空气流在进气道出口直接撞击不利于燃烧效率的提高； 9在适当范围内增大空燃比能显著提高燃烧效率。
The mixing of air and fuel can be improved , d ) adding air distributary valve at exit of air - intake can increase the amount of air bifurcated into the dome region , so the value of combustion efficiency is increased , e ) increasing gas generator nozzle number can improve combustion characteristics in the dome region and produce good condition for combustion progress , f ) when the fuel streams are ejected into the second combustor with a angle , the combustion efficiency is increased , g ) when the speed of fuel streams increased , the intension and temperature of recirculation region is improved 两个进气道在补燃室周向成180度布置，有利于增强燃气同空气的掺混； 4在进气道出口增加空气分流挡板，有利于增加进入头部的空气流量，提高燃烧效率； 5增加燃气喷管数量能增强燃气同空气在头部的燃烧效果，为燃烧的进行创造良好的条件； 6
In this paper , simple reacting flow model in solid - propellant ducted rocket combustor based on eddy break - up model is established . the model is used to simulate the three - dimensional combustion flowfields in an experimental motor . some factors how to affect the combustion efficiency are discussed in the paper , including air intake and gas generator nozzle 本文基于简单反应的旋涡分裂模型，建立了固体火箭冲压发动机补燃室内的湍流燃烧模型，并在该模型下对某实验发动机进行了三维数值模拟，研究了补燃室设计参数包括进气道出口设计参数和燃气发生器喷管设计参数对燃烧效率的影响。
The simulations results show that the spoiler is available to make the fuel and the oxidizer coming from the former to stay in the cavity for a long time , to let the fuel and oxidizer mix and burn completely . since there is a high temperature zone forming by vortex in the middle of the motor , it required a restricted thermal protection . the plate with holes decreased the vortex function in the cavity , which could not promote the combustion efficiency , but to decrease temperature in the cavity and be benefit to thermal protection of the wall 计算结果分析表明:扰流板可以使燃料和氧化剂在扰流腔内的滞留时间加长,促进燃料与氧化剂的掺混燃烧,提高燃烧效率,但由于涡流在发动机的中间部位形成了高温燃烧区域,致使局部燃料和绝热层烧蚀速率增大,加大了热防护的难度;孔板结构减弱了扰流腔内回流区的漩流作用,不能增加推进剂燃烧效率,但可以使扰流腔内的温度降低,给壁面热防护带来好处。
Biomass fuel is used as reburning fuel to deoxidize no is first experimental studied in this article . conclusions can be drawn from the experimental results that under certain conditions , nox deoxidized efficiency can achieve 50 % - 70 % . compared with coal , biomass volatilization and combustion time is short , so boiler combustion efficiency can be guaranteed 本文首次进行了生物质燃料作为再燃燃料还原no的试验研究，研究表明生物质燃料再燃还原no可以取得非常好的效果，在一定的条件下可以达到50 - 70 ，生物质燃料的挥发分析出和燃烧的时间都要比煤粉短，用作再燃燃料可以有效的保证锅炉的效率。
