Re: Anledning till avgasmottryck, turbo
Postat: mån aug 23, 2021 11:44 pm
Har du fått iden om att det är sinusvågor i en motor från tryckhistoriken på en motor?
Du borde läsa Blairs 4 taktsbok: https://www.bokus.com/bok/9780768004403 ... e-engines/
Här är ur ett kapitel från 2 taktsboken:
The reader is already familiar with the motion of pressure waves of small
amplitude, for they are acoustic waves, or sound. Some of our personal experience
with sound waves is helpful in understanding the fundamental nature of the flow of
the much larger amplitude waves to be found in engine duets. Pressure waves, and
sound waves, are of two types: (1 } compression waves or (2) expansion waves. This
is illustrated in Fig, 2.L In both Fig, 2.1(a) and (b)* the undisturbed pressure and
temperature in the pipe ahead of the pressure wave is Po and To. respectively.
The compression wave in the pipe is shown in Fig, 2.1(a) and the expansion w ave
in Fig, 2, 1(b), and both waves are propagating towards the right in the diagram. At
a point on the compression wave the pressure is Pc, where Pe>Po, and ir is being
propagated at a veloe ity , CPe. It is also moving gas particles at a gas partic le ve locity
of CGe and in the same direction as the wave is being propagated. At a point on the
expansion wave in the pipe the pressure is Pi, where PkPo, and it is being
propagated at a velocity, CPi. It is also moving gas particles at a gas particle velocity
of CGi, but in the opposite direction to that which the wave is being propagated.
2.1.3 Finite amplitude waves ,
Any pressure wave with a pressure ratio greater than an acoustic wave is called
a wave of finite amplitude.
Hela bokens text finns här: https://archive.org/stream/TheBasicDesi ... s_djvu.txt
Erland
Du borde läsa Blairs 4 taktsbok: https://www.bokus.com/bok/9780768004403 ... e-engines/
Här är ur ett kapitel från 2 taktsboken:
The reader is already familiar with the motion of pressure waves of small
amplitude, for they are acoustic waves, or sound. Some of our personal experience
with sound waves is helpful in understanding the fundamental nature of the flow of
the much larger amplitude waves to be found in engine duets. Pressure waves, and
sound waves, are of two types: (1 } compression waves or (2) expansion waves. This
is illustrated in Fig, 2.L In both Fig, 2.1(a) and (b)* the undisturbed pressure and
temperature in the pipe ahead of the pressure wave is Po and To. respectively.
The compression wave in the pipe is shown in Fig, 2.1(a) and the expansion w ave
in Fig, 2, 1(b), and both waves are propagating towards the right in the diagram. At
a point on the compression wave the pressure is Pc, where Pe>Po, and ir is being
propagated at a veloe ity , CPe. It is also moving gas particles at a gas partic le ve locity
of CGe and in the same direction as the wave is being propagated. At a point on the
expansion wave in the pipe the pressure is Pi, where PkPo, and it is being
propagated at a velocity, CPi. It is also moving gas particles at a gas particle velocity
of CGi, but in the opposite direction to that which the wave is being propagated.
2.1.3 Finite amplitude waves ,
Any pressure wave with a pressure ratio greater than an acoustic wave is called
a wave of finite amplitude.
Hela bokens text finns här: https://archive.org/stream/TheBasicDesi ... s_djvu.txt
Erland