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RWDboy Forums Junkie Location: South Australia Registered: July 2002	Re: Head flow and flame propegation issues in turbocharged cars Fri, 29 October 2004 14:25 Quote: in the squish area the gases get a high rate of compression just as the piston reaches TDC ... this results in these gases being at _higher_ pressure than the rest of the combustion chamber, and as a result, sort of spray out into the rest of the chamber... ...This high rate of compression will also cause a large temperature rise in the gas... ...have to remember that ignition occurred a while ago relative to the squish (sayy 20 deg BTDC), the the flame front is already propogating away from the spark plug. the 'squished gas' is squirted toward the flame front, and causes tumbling and turbulence and mixing of burning and unburnt gas... resulting in a much smoother burn... Does this mean that squish areas near the spark plug (for example) will cause higher levels of NOx emissions - due to the increased peak temperature at the flame front (this increased flame front temperature provides energy of activation, or merely changes the equillibrium? I haven't done any chemistry since year 12!!!). What would happen to the overall temperature of process - I'm guessing it would be more complete combustion, meaning a higher level of chemical energy would be changed into heat/kinetic energy? ie hotter (although more efficient)? [Report message to a moderator]

	Subject	Poster	Date
	Head flow and flame propegation issues in turbocharged cars	Shraka	Wed, 27 October 2004 02:14
	Re: Head flow and flame propegation issues in turbocharged cars	Bill Sherwood	Wed, 27 October 2004 02:21
	Re: Head flow and flame propegation issues in turbocharged cars	Shraka	Wed, 27 October 2004 02:30
	Re: Head flow and flame propegation issues in turbocharged cars	oldcorollas	Wed, 27 October 2004 02:44
	Re: Head flow and flame propegation issues in turbocharged cars	oldcorollas	Wed, 27 October 2004 02:50
	Re: Head flow and flame propegation issues in turbocharged cars	Bill Sherwood	Wed, 27 October 2004 02:56
	Re: Head flow and flame propegation issues in turbocharged cars	oldcorollas	Wed, 27 October 2004 02:58
	Re: Head flow and flame propegation issues in turbocharged cars	Bill Sherwood	Wed, 27 October 2004 02:43
	Re: Head flow and flame propegation issues in turbocharged cars	Shraka	Wed, 27 October 2004 02:57
	Re: Head flow and flame propegation issues in turbocharged cars	Bill Sherwood	Wed, 27 October 2004 03:06
	Re: Head flow and flame propegation issues in turbocharged cars	Bill Sherwood	Wed, 27 October 2004 02:49
	Re: Head flow and flame propegation issues in turbocharged cars	Shraka	Wed, 27 October 2004 03:39
	Re: Head flow and flame propegation issues in turbocharged cars	oldcorollas	Wed, 27 October 2004 03:49
	Re: Head flow and flame propegation issues in turbocharged cars	Bill Sherwood	Wed, 27 October 2004 04:00
	Re: Head flow and flame propegation issues in turbocharged cars	Shraka	Wed, 27 October 2004 04:20
	Re: Head flow and flame propegation issues in turbocharged cars	Joshstix	Wed, 27 October 2004 04:28
	Re: Head flow and flame propegation issues in turbocharged cars	Shraka	Wed, 27 October 2004 06:29
	Re: Head flow and flame propegation issues in turbocharged cars	indigoid	Thu, 28 October 2004 11:40
	Re: Head flow and flame propegation issues in turbocharged cars	Shraka	Fri, 29 October 2004 03:23
	Re: Head flow and flame propegation issues in turbocharged cars	da_horse	Wed, 27 October 2004 20:34
	Re: Head flow and flame propegation issues in turbocharged cars	Norbie	Thu, 28 October 2004 01:49
	Re: Head flow and flame propegation issues in turbocharged cars	da_horse	Thu, 28 October 2004 11:24
	Re: Head flow and flame propegation issues in turbocharged cars	rokusan	Thu, 28 October 2004 12:04
	Re: Head flow and flame propegation issues in turbocharged cars	takai	Fri, 29 October 2004 12:41
	Re: Head flow and flame propegation issues in turbocharged cars	indigoid	Fri, 29 October 2004 12:44
	Re: Head flow and flame propegation issues in turbocharged cars	RWDboy	Fri, 29 October 2004 14:25
	Re: Head flow and flame propegation issues in turbocharged cars	M.W.P.	Fri, 29 October 2004 16:44
	Re: Head flow and flame propegation issues in turbocharged cars	RWDboy	Sat, 30 October 2004 03:59
	Re: Head flow and flame propegation issues in turbocharged cars	Shraka	Mon, 01 November 2004 03:15
	Re: Head flow and flame propegation issues in turbocharged cars	RWDboy	Mon, 01 November 2004 03:54
	Re: Head flow and flame propegation issues in turbocharged cars	Joshstix	Mon, 01 November 2004 06:04
	Re: Head flow and flame propegation issues in turbocharged cars	Shraka	Mon, 01 November 2004 06:15
	Re: Head flow and flame propegation issues in turbocharged cars	oldcorollas	Mon, 01 November 2004 06:18
	Re: Head flow and flame propegation issues in turbocharged cars	justcallmefrank	Mon, 01 November 2004 06:19
	Re: Head flow and flame propegation issues in turbocharged cars	Joshstix	Mon, 01 November 2004 06:21
	Re: Head flow and flame propegation issues in turbocharged cars	oldcorollas	Mon, 01 November 2004 06:48
	Re: Head flow and flame propegation issues in turbocharged cars	justcallmefrank	Mon, 01 November 2004 07:34
	Re: Head flow and flame propegation issues in turbocharged cars	Mr DOHC	Mon, 01 November 2004 08:28
	Re: Head flow and flame propegation issues in turbocharged cars	Shraka	Mon, 01 November 2004 09:26
	Re: Head flow and flame propegation issues in turbocharged cars	oldcorollas	Mon, 01 November 2004 09:04
	Re: Head flow and flame propegation issues in turbocharged cars	justcallmefrank	Mon, 01 November 2004 09:07
	Re: Head flow and flame propegation issues in turbocharged cars	Shraka	Mon, 01 November 2004 09:27
	Re: Head flow and flame propegation issues in turbocharged cars	justcallmefrank	Mon, 01 November 2004 09:32
	Re: Head flow and flame propegation issues in turbocharged cars	RWDboy	Mon, 01 November 2004 13:08
	Re: Head flow and flame propegation issues in turbocharged cars	Shraka	Mon, 01 November 2004 13:13
	Re: Head flow and flame propegation issues in turbocharged cars	earlyrolla	Mon, 01 November 2004 14:38

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