﻿Ignition of Gases by Sudden Compression. 



Table VI. 



Ignition of heptane by air. No fan. 



Lowest ignition temperature T taken as 553 absolute. 



103 



T 



assumed = 10. 



T/T . 



T. 



1° C. 



a( ( \^)t(theov.). 



t (calc). 



1-004 



555 



282 



0-112 



0-51 sec. 



101 



558*5 



285-5 



0075 



0-34 „ 



1-03 



569-5 



2965 



0-036 



01 64 „ 



1-07 



592 



319 



0-014 



0063 „ 



111 



614 



341 



0-0065 



003 ;, 



1-27 



702 



429 



0-0007 



0-003 „ 



The last column contains the theoretical " delays " that 

 should occur at compression temperatures given in the third 

 column, if the temperature coefficient of the reaction 



corresponds to a value of ^ = 10. 



J-o 









Fig. 9 























ft 



350 



' I 





Heptane and A 





• 





+ ^ 



?""••— 















"*" N ° ' 9nlt '° n ' 







^ V ^^ < K 



"* ~4- "*" 

















No ignition. 



=> + + 



0-3 



Seconds delay 



The corresponding theoretical curve is shown in fig. 9, 

 the experimental points taken from Table III. being marked 

 with a cross. The general agreement is all that could be 

 desired. 



