《绘制水轮机运转综合特性曲线》由会员分享，可在线阅读，更多相关《绘制水轮机运转综合特性曲线（5页珍藏版）》请在金锄头文库上搜索。
1、第二节 绘制水轮机运转综合特性曲线一、绘制等效率线和5%出力限制线1、绘制等效率曲线n=f (H, N)(1)列表计算。在最小水头到最大水头的范围内，一般取35个水头列表进行 计算，通常包括H、H、H和H 。对本设计，在水轮机的工作水头范围以内 minravmax取五个水头 Hi=Hmax=101m,H2=94m,H3=88m,H4=H尸Hav=82m,H5=Hmin=7& 对本设 计，由于是混流式水轮机，表格的形式如表8所示。计算时首先求出与各水头相应的n11M值，然后在模型主要综合特性曲线上作 n11M等于常数的水平线，取n11M线与nM=常数线的交点，依次在表8中记入nM、 n和n值。表
2、8HL180水轮机运转综合特性曲线计算表转轮型号： HL180 ； D1= 3.80 (m)； n=略；H =101(m)； H= 82(m)； Hmax r m166.7 r/min； An110.03n110M，可忽 n= 78(m)； An= 0.023。H (m)H1=Hmax=101H2=94n11=nD/H1/263.0365.34n11M=n11-An1163.0365.34工作特 性曲线 计算nM(%)H(%)Qi(m3/s)N (MW)nM(%)H(%)Qi(m3/s)N (MW)7878.0231.007112.977878.0231.014102.148080.0230.
3、988113.688080.0230.993102.598282.0230.962113.468282.0230.970102.728484.0230.938113.328484.0230.945102.518686.0230.91112.568686.0230.920102.178888.0230.876110.878888.0230.883100.349090.0230.828107.189090.0230.83597.049191.0230.793103.799191.0230.80294.249191.0230.60579.189191.0230.61572.279090.0230.5
4、7674.569090.0230.58267.648888.0230.53267.338888.0230.54361.718686.0230.49461.108686.0230.50155.648484.0230.46055.578484.0230.46350.228282.0230.43050.718282.0230.43245.75功率限 制线计 算89.2289.2430.844108.3089.3389.3530.84997.94H (m)H3=88H4=H =H =824ranii=nDi/Hi/267.5369.95nilM=ni1-Ani167.5369.95工作特 性曲线 计算
5、nM(%)H(%)Qi(m3/s)N (MW)nM(%)H(%)Qi(m3/s)N (MW)7878.0231.02293.257878.0231.02484.048080.0231.00093.588080.0231.00384.438282.0230.97793.718282.0230.97884.388484.0230.95193.448484.0230.95784.588686.0230.92192.658686.0230.92483.618888.0230.88891.408888.0230.88982.319090.0230.84188.539090.0230.84179.6491
6、91.0230.81186.329191.0230.81177.659191.0230.64068.129191.0230.67564.639090.0230.60063.169090.0230.62959.568888.0230.55857.448888.0230.57553.248686.0230.50050.308686.0230.53047.968484.0230.46445.598484.0230.48943.228282.0230.43942.118282.0230.44738.57功率限 制线计 算89.4289.4430.85189.0189.3789.3930.85780.5
7、8H (m)H5=H . =785minnii=nDi/Hl/271.73ni1M=ni1-Ani171.73工作特 性曲线 计算nM(%)H(%)Qi(m3/s)N (MW)7878.0231.02678.128080.0231.00578.488282.0230.97978.368484.0230.95878.558686.0230.92477.568888.0230.89076.459090.0230.84474.149191.0230.80871.779191.0230.70162.279090.0230.65557.548888.0230.59451.028686.0230.5464
8、5.838484.0230.50341.248282.0230.45636.50功率限 制线计 算89.3389.3530.86074.99注：（1）n=nM+An；（2） N=9.81Q1D21H3/2no表9HL160水轮机运转综合特性曲线计算表转轮型号：HL160 ； D,= 4.50 （m）； n= 136.4 r/min； An110.03n11OM,可忽略; 1 11110MHmax= 101 （m）； H 82 （m）； H . = 78 （m）； An= 0.031。 r= min 1H（m）H1=H =1011maxH2=94n11=nD1/H1/261.0863.31n11
9、M=n11-An1161.0863.31工作特 性曲线 计算nM（%）n（%）QI（m3/s）N （MW）nM（%）n（%）QI（m3/s）N（MW）7676.0310.805119.787676.0310.811134.407878.0310.789120.497878.0310.794135.058080.0310.773121.078080.0310.779135.898282.0310.751120.578282.0310.759135.718484.0310.739121.538484.0310.743136.098686.0310.703118.368686.0310.714133
10、.898888.0310.665114.578888.0310.679130.299090.0310.009090.0310.625122.659090.0310.009090.0310.518101.658888.0310.46980.808888.0310.46188.468686.0310.42671.738686.0310.42479.518484.0310.39765.298484.0310.39672.5318282.0310.36758.928282.0310.36665.448080.0310.39561.878080.0310.39368.567878.0310.32449.
11、487878.0310.32254.7：r功率限 制线计 算87.987.9310.666114.6188.588.5310.666128.52H (m)H3=88H4=Hr=Ha=82n11=nD1/H1/265.4367.78n11M=n11-A.65.4367.78工作特性曲线计算功率限制线计算H (m)n11=nD1/H1/2n11M=n11-An11nM (%) 76 7?80-828T8688909088868T82 80- 7889.1n (%)76.03178.03180.03182.03184.03186.03188.03190.03190.03188.03186.03184
12、.03182.03180.03178.03189.131QI(m3/s)0.8160.8000.7830.7630.7470.7220.6890.6470.5050.4620.4270.3990.3690.3960.320N (MW) 149.30 150.22 150.80 150.62 151.05 149.47 145.96 140.17 109.41 97.87 88.40 80.68 72.84 76.26 60.09nM(%)76-10-亘8T1618909018168T亘1qn (%)76.03178.03180.03182.03184.03186.03188.03190.031
