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在中学热机的教学中,对蒸汽轮机和喷气发动机部分会遇见先收缩后扩张的形状特殊的喷管.目前在大的动力工程方面蒸汽轮机几乎是占有统治地位的,这是因为蒸汽轮机比起其他的热机如蒸汽机、内燃机来具有很多的优点,特别是它没有往复运动的活塞,因此是一种能够连续进行热力过程,能以尺寸不大的体积发出巨大功率的高速发动机.蒸汽轮机的基本原理是利用高压蒸汽通过喷管变成高速气流,从而推动转子,把热连续地转变为功.这在2000多年前人们已经知道,然而第一台蒸汽轮机直到在十九世纪末才创造成功,而结构原理比它复杂的往复蒸汽机却在十八世纪
In the teaching of middle school heat engines, steam turbines and jet engines partially meet the special shape of the first contraction and expansion of the nozzle. Currently in the large power engineering steam turbine is almost dominant, because the steam turbine compared to Other heat engines, such as steam engines and internal combustion engines, have many advantages. In particular, they have no reciprocating pistons. Therefore, they are a high-speed engine capable of continuous thermal processes and capable of generating huge power in a small-sized volume. The basic of steam turbines The principle is to use high-pressure steam to turn into high-speed air flow through nozzles, thereby propelling the rotor and continuously converting heat into work. This was known more than 2,000 years ago. However, the first steam turbine did not succeed until the end of the 19th century. The structural principle is more complicated than its complicated reciprocating steam engine in the eighteenth century