排序方式: 共有9条查询结果,搜索用时 15 毫秒
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聂耀光 《川北教育学院学报》2000,10(4):53-57
以真实气体与理想气体的偏差为依据,探讨范德华方程式的导出,举例推证范德华方程在修正热力学关系式方面的应用,同时论证并解释范德华方程用于计算方面的不准确性。 相似文献
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基于索科洛夫喷射器设计理论,结合IF97水和水蒸气性质通用计算模型,建立了一种通用的工质性质采用真实气体性质进行计算的喷射器设计计算方法;对一给定工作蒸汽热力参数、引射蒸汽热力参数以及出口压力对应最大喷射系数的喷射器进行了设计,结果表明:采用不同的物性计算模型对设计结果有很大的影响。 相似文献
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对高压气体的计算,人们经常使用“压缩因子法”。而压缩因子的具体数值是从普遍化压缩因子图上查得。文章对压缩因子数值的定量计算进行了探讨。 相似文献
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郭玉 《中学生数理化(高中版)》2009,(4):66-67
常听到一些学生说:"老师上课讲的我能听懂,教科书上写的也能看懂,就是回答问题容易出错,没见过的问题不知如何下手".学生说这样的话,表明他还未体会怎样叫懂,他把假懂误认为是"真懂".针对这种现象,我们在教学中 相似文献
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Design and preliminary experimental investigation of a 4 K Stirling-type pulse tube cryocooler with precooling 总被引:1,自引:0,他引:1
A Stirling-type pulse tube cryocooler (PTC) with precooling was designed and manufactured to investigate its performance at 4 K. Numerical simulation was carried out based on the well-known regenerator model REGEN with an emphasis on the performance of a 4 K stage regenerator of the Stifling-type PTC as influenced by the warm end temperature, pressure ratio, frequency and average pressure with helium-4 and helium-3 as the working fluid respectively. This study demonstrates that the use of a cold inertance tube can significantly improve the efficiency of a 4 K Stirling-type PTC. A preliminary experimental investigation was carried out with helium-4 as the working fluid and a refrigeration temperature of 4.23 K was achieved. The experimental results show that the operating frequency has a significant influence on the performance of the Stirling-type PTC and a relatively low average pressure is favorable for decreasing the loss associated with the real gas effects of a 4 K Stirling-type PTC. 相似文献
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聂耀光 《四川职业技术学院学报》2000,(4)
以真实气体与理想气体的偏差为依据 ,探讨范德华方程式的导出 ,举例推证范德华方程在修正热力学关系式方面的应用 ,同时论证并解释范德华方程用于计算方面的不准确性 相似文献
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