柴油机热力计算

Z3102增压柴油机热力计算;㈠已知条件：①给定条件:缸径D=102mm行程S=105mm功率Pe=34kW转速n=1800r/min压缩比εc=14单缸容积Vs=πD2S/4=3.14*1022*105/4=857549.7mm3=0.858L连杆比λ=0.28大气状态p0=100kPaT0=290K燃料平均质量成分gC=0.87gH=0.126gO=0.004增压器增压比π=1.7进气前充量温度Ts=330K燃料低热值Hu=42500Kj/Kg柴油燃烧室ω型直喷式②参数选择最大爆发压力pz=9.8MPa过量空气系数Φa=1.8残余废气系数φr=0z、b点热利用系数ξz=0.75ξb=0.85示功图丰满系数φi=0.96排气终点温度Tr=900K机械效率ηm=0.87㈡计算燃料热化学计算：1；理论空气量L0===0.495kmol/kgeqf(1,0.21)

2;新鲜充量M1=Φa*L0=1.8*0.495=0.866kmol/kg3;燃烧产物M2M2=M1+=0.866+=0.8974kmol/kg4;理论分子变更系数===1.0365;实际分子变更系数===1.036②进气过程计算1；进气终点压力==0.9*π*p0=0.9*1.7*0.1Mpa=0.153Mpa2;进气终点温度（取进气加热温度ΔT=10K）Ta===340K3；充量系数φc===0.9414；空气流量Gs===0.0717kg/s其中：扫气系数φs=1.1③压缩过程计算1；平均多变压缩指数n1=1.382；压缩过程中任一点x的压力Pcx==0.153*其中Vcx：x点的气缸容积Vcx=：从上止点到x点的曲轴转角Vc===0.066L3；压缩终点压力Pc=pa*εn1=0.153*141.38Mpa=5.839Mpa4；压缩终点温度==340*140.38K=926.546K④燃烧过程计算1；压力升高比===1.682；压缩终点c的空气平均摩尔定压比热容=28.184+0.0025=28.184+0.0025*926.546=30.500kJ/(kmol.k)3；z点燃烧产物平均摩尔定压比热容===13.090+16.984+0.0021*Tz=30.074+0.0021*Tz4；计算最高燃烧温度由代入数据得：Tz==其中μz=1+(μ-1)=1+(1.035-1)*=1.03对试算后得=1967K5；定压膨胀比ρ===1.26⑤膨胀过程计算1；平均多变膨胀指数n2=1.242；膨胀过程中任意点x的压力===3；膨胀终点的压力===0.495Mpa4；膨胀终点的温度===1103.628K⑥指示性能参数1；平均指示压力===1.139Mpa2；指示热效率=0.4103；指示燃油消耗率==206.600g/kW.h⑦有效性能参数1；有效热效率0.410*0.87=0.35672；有效燃油消耗率==237.470g/kW.h3；平均有效压力=1.139*0.87=0.9901Mpa4；有效功率==38.228kW；⑧P-Φ图绘制VP0.92354970.1530.915382560.1548870010.907215420.1568145010.899048280.1587837470.890881140.1607960330.8827140.1628527080.874546860.1649551760.866379720.1671048990.858212580.1693033990.850045440.1715522620.84187830.1738531450.833711160.1762077710.825544020.1786179420.817376880.1810855360.809209740.1836125180.80104260.1862009360.792875460.1888529350.784708320.1915707550.776541180.1943567410.768374040.1972133460.76020690.2001431410.752039760.2031488170.743872620.2062331970.735705480.2093992390.727538340.2126500480.71937120.2159888840.711204060.2194191720.703036920.222944510.694869780.2265686830.686702640.2302956720.67853550.234129670.670368360.2380750940.662201220.2421365990.654034080.2463190960.645866940.250627770.63769980.2550680950.629532660.2596458580.621365520.264367180.613198380.269238540.605031240.2742668020.59686410.279459240.588696960.2848235740.580529820.2903679980.572362680.2961012220.564195540.3020325090.55602840.3081717190.547861260.3145293580.539694120.3211166310.531526980.3279454970.523359840.3350287380.51519270.3423800240.507025560.3500139940.498858420.3579463370.490691280.3661938920.482524140.374774750.4743570.383708370.466189860.3930157090.458022720.4027193670.449855580.4128437470.441688440.4234152350.43352130.4344624010.425354160.4460162280.417187020.4581103660.409019880.4707814150.400852740.4840692590.39268560.4980174260.384518460.512673510.376351320.5280896470.368184180.5443230610.360017040.5614366860.35184990.5794998790.343682760.5985892520.335515620.6187896190.327348480.6401951090.319181340.6629104490.31101420.6870524690.302847060.7127518710.294679920.7401553040.286512780.7694278250.278345640.8007558170.27017850.8343504810.262011360.8704520210.253844220.9093346930.245677080.9513129310.237509940.9967488320.22934281.0460613430.221175661.0997376350.213008521.1583472720.204841381.222560020.196674241.2931683960.18850711.3711165170.180339961.4575373360.172172821.5538012540.164005681.6615803150.155838541.782934070.14767141.9204260320.139504262.0772841020.131337122.2576253410.123169982.4667769620.115002842.7117446080.10683573.0019121160.098668563.3501162340.090501423.7743499320.082334284.3005623710.074167144.9674635730.0665.8352030710.0669.80.083169.80.090501428.8240374730.098668567.9275379930.10683577.1830964160.115002846.5560372220.123169986.0213516610.131337125.5605729880.139504265.1597845670.14767144.8083105060.155838544.4978316060.164005684.2217742740.172172823.9748792190.180339963.752891340.18850713.5523329850.196674243.3703356620.204841383.2045134030.213008523.0528662860.221175662.913706080.22934282.7855983390.237509942.6673168730.245677082.5578076150.253844222.4561597250.262011362.3615822790.27017852.2733853490.278345642.1909645330.286512782.1137882210.294679922.0413870620.302847061.9733451970.31101421.9092929160.319181341.8489004990.327348481.7918729940.335515621.7379458050.343682761.6868809160.35184991.638463670.360017041.5925000010.368184181.5488140440.376351321.5072460750.384518461.4676507160.39268561.4298953760.400852741.3938588910.409019881.3594303280.417187021.3265079430.425354161.2949982540.43352131.2648152280.441688441.2358795640.449855581.208118050.458022721.1814629990.466189861.155851740.4743571.1312261670.482524141.1075323370.490691281.0847201050.498858421.06274280.507025561.0415569320.51519271.0211219290.523359841.0013998990.531526980.9823554130.539694120.9639553110.547861260.9461685270.55602840.9289659240.564195540.9123201510.572362680.8962055090.580529820.880597830.588696960.8654743640.59686410.850813680.605031240.836595570.613198380.8228009660.621365520.8094118630.629532660.7964112420.63769980.7837830070.645866940.7715119260.654034080.7595835690.662201220.7479842630.670368360.7367010370.67853550.7257215840.6867