The cause of the
preignition and/or detonation could not be determined.
This deposit tends to block proper heat transfer out of the cylinder, raising temperatures throughout the combustion cycle and increasing the tendency toward detonation or
preignition.
The "ping" associated with low-grade fuel in a car can become
preignition and explosive detonation in an aircraft engine after only seconds of high-power operation, causing engine failure.
The fuel variable included the constant heat of
preignition of dry fuels ([Q.sub.d]: 581 kJ/kg) such that the fuel variable had the same units as intensity (kilowatts per metre):
To reduce the tendency for
preignition, motorists are required to use high-octane fuels, which are more expensive than regular fuels.
Pre-Launch Insurance (sometimes referred to as "
preignition," transit and ground property) is generally maintained by the owner-operator to cover the satellite and related equipment against all risks of physical loss or damage occurring at any time or place prior to launch, including while in the transit, storage, "
preignition (while at the launch site)," mating to the launcher and other phases.
Severe or extreme detonation can quickly lead to engine destruction directly, or by launching
preignition, which can destroy an engine in seconds.
The term "cool flame" is conventionally used to collectively describe the low- and intermediate-temperature (approximately 500K-900 K) oxidative
preignition reactions emerging in reactive systems fed with organic fuels, such as saturated and unsaturated hydrocarbons, alcohols, aldehydes, ketones, acids, oils, ethers, and waxes [13, 14].