_:n9bcb897aa6d94e999336183ecd346005xb0
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"\n\t\t<p>In a series of experiments, Chinese scientists <a href=\"https://www.scmp.com/news/china/science/article/3193116/chinese-scientists-say-coal-power-could-slash-hypersonic-flight\" rel=\"nofollow noopener\" target=\"_blank\">showed the operation of the engine</a> for hypersonic aircraft, the fuel for which is ethylene vapor mixed with coal powder.  At the start, the exhaust from the nozzles of such an engine is similar to the smoke from the chimney of a steam locomotive, but in general, such fuel will be 20% more efficient and cleaner than alternative mixtures.</p>\n\n\n<img itemprop=\"image\" src=\"https://www.aroged.com/wp-content/uploads/2022/09/China-tests-detonation-hypersonic-engine-that-runs-on-coal.jpg\" alt=\"  Image Source: SCMP \" height=\"500\" width=\"750\"/>\n\n<p class=\"caption\">Image Source: SCMP</p>\n\n\n\n<p>For the first time, Russian scientists proposed to use coal powder for rocket detonation \"explosive\" engines about ten years ago.  True, experts from the Russian Academy of Sciences recommended using liquid hydrogen as the basis for fuel.  But liquid hydrogen is a complex system of onboard storage and transport of fuel cooled to ultra-low temperatures.  Therefore, the Chinese went further and switched to ethylene, or rather its vapors, which are also suitable for igniting fuel and starting a continuous series of its detonations.  This greatly simplified the fuel system.</p>\n<p>In experiments, physicists at the Nanjing University of Science and Technology showed that the speed of the shock wave in the engine on coal powder and ethylene vapor reaches a speed of 2 thousand m/s, which is six times the speed of sound.  Importantly, the researchers launched the engine prototype over a wide range of temperatures under conditions of oxygen deficiency and excess.  In all cases, the prototype showed stable launch and detonation series.  This means that this type of engine and fuel mixture will be suitable for flying at different speeds and altitudes.  For example, a hypersonic aircraft with such an engine will be able to take off and land at conventional airfields at low speeds, which is impossible or difficult to implement for other types of hypersonic engines.</p>\n\n\n<img itemprop=\"image\" src=\"https://www.aroged.com/wp-content/uploads/2022/09/1663670899_787_China-tests-detonation-hypersonic-engine-that-runs-on-coal.jpg\" alt=\"  Launch of a hypersonic engine on coal powder.  Image Source: Nanjing University of Science and Technology \" height=\"435\" width=\"750\"/>\n\n<p class=\"caption\">Launch of a hypersonic engine on coal powder.  Image Source: Nanjing University of Science and Technology</p>\n\n\n\n<p>The same team of scientists in May of this year announced the development of a detonation hypersonic engine using kerosene and ethylene, which is also an efficient and environmentally friendly fuel.  Another group of Chinese specialists is developing hypersonic ammonia engines capable of flying at speeds up to Mach 10.  Also, the Chinese are developing a boron, which will allow hypersonic aircraft to move not only in the air, but even under water.  This allows us to state that China, like Russia, has mastered the development of hypersonic engines to a first approximation, but is not going to stop there.</p>\n \t\t\t<p>If you notice an error, select it with the mouse and press CTRL + ENTER.</p>\r\n"
<https://www.aroged.com/2022/09/20/china-tests-detonation-hypersonic-engine-that-runs-on-coal/>