Initial comparison of single cylinder Stirling engine computer model predictions with test results
Initial comparison of single cylinder Stirling engine computer model predictions with test results
复制标题
单缸斯特林发动机计算机模型预测与测试结果的初步比较
DOI：
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发表时间：
1979
期刊：
影响因子：
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通讯作者：
D. Miao
中科院分区：
文献类型：
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作者：
R. Tew;L. G. Thieme;D. Miao
NASA开发的数字计算机代码的斯特林发动机，模拟的性能，一个单一的缸菱形驱动地面性能单元（GPU），并将其预测与测试结果进行了比较。GPU引擎包含8个再生器/冷却器单元，引擎工作空间由13个控制体积建模。该模型计算给定发动机转速、平均压力、加热器和膨胀空间金属温度以及冷却器水入口温度和流速的指示功率和效率。预测和观察到的功率的比较意味着参考压降计算低估了实际压降，可能是由于回热器/冷却器单元中的油污染、工作气体中的甲烷污染或低估了机械损失。对于工作气体为氢气的情况，制动功率的预测值比实验值高0 ~ 6%，制动效率高6 ~ 16%，而对于工作气体为氦气的情况，制动功率和制动效率的预测值比实验值高2 ~ 15%。
A NASA developed digital computer code for a Stirling engine, modelling the performance of a single cylinder rhombic drive ground performance unit (GPU), is presented and its predictions are compared to test results. The GPU engine incorporates eight regenerator/cooler units and the engine working space is modelled by thirteen control volumes. The model calculates indicated power and efficiency for a given engine speed, mean pressure, heater and expansion space metal temperatures and cooler water inlet temperature and flow rate. Comparison of predicted and observed powers implies that the reference pressure drop calculations underestimate actual pressure drop, possibly due to oil contamination in the regenerator/cooler units, methane contamination in the working gas or the underestimation of mechanical loss. For a working gas of hydrogen, the predicted values of brake power are from 0 to 6% higher than experimental values, and brake efficiency is 6 to 16% higher, while for helium the predicted brake power and efficiency are 2 to 15% higher than the experimental.