Spherical reentrant chamber
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United States of America Patent
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Nov 3, 1981
Grant Date -
N/A
app pub date -
Dec 11, 1978
filing date -
Dec 11, 1978
priority date (Note) -
Expired
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Abstract
A technique for improving in an internal combustion engine the coupling of microwave energy to the flame-front of a combusting air-fuel mixture plasma, by shaping the combustion chamber so that the latter accommodates the lowest order 'spherical re-entrant' microwave mode (the TM.sub.010.sup.sr mode). Such a shape contributes to optimum coupling of microwave energy to the flame-front plasma, since this mode (a) minimizes the microwave frequency and hence the flame-front plasma Q and (b) minimizes the variation of Q with flame-front growth.
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