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发表于 2015-4-10 08:28:26
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本帖最后由 zzzxxx007 于 2015-4-10 09:42 编辑
即使是活塞式发动机也不是对爆震一点办法都没有，我看到了很有意思的一段话：
Generally speaking, air-cooled engines operate
closer to the temperature margin where predetonation occurs. Thus, an
air-cooled engine with a simple supercharger will always operate at a
disadvantage compared to a similarly-equipped liquid-cooled engine in a
situation requring a high degree of supercharging, particularly air-to-air
combat at altitudes just below maximum effective throttle height, which was
quite high by 1944. (This would be particularly true of the wartime air
cooled engines with cooling fans, such as the BMW 801 installed on the Fw
190.) American exhaust turbosupercharged air-cooled engines are not an
exception. They worked quite well at high altitudes because they interposed
an intercooler between the turbocharger and the manifold, but the American
turbocharged aircraft were enormous compared to the Fw 190, and needed that
size for the intercooler's plumbing.
另外，喷气式发动机燃烧室是一个完全不同的概念，在燃烧室中需要在高速流动的空气中制造稳定而且持续的火焰，这个与活塞式发动机气缸内的相对静止的空气中制造短暂但充分燃烧的火焰是有本质不同的，所以在燃烧上喷气发动机和活塞式发动机其实是没有任何可比性的。。。
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发表于 2015-4-10 02:42:54
