combustion behavior
51Depleted uranium — The DU penetrator of a 30 mm round[1] Depleted uranium (DU; also referred to in the past as Q metal, depletalloy, or D 38) is uranium with a lower content of the fissile isotope U 235 than natural uranium (natural uranium is about 99.27% uranium… …
52Incense — Burning incense Incense (from Latin: incendere, to burn )[1] is composed of aromatic biotic materials, which release fragrant smoke when burned. The term incense refers to the substance itself, rather than to the odor that it produces. It is used …
53Pulse detonation engine — A pulse detonation engine, or PDE , is a type of propulsion system that can operate from subsonic up to hypersonic speeds. In theory the PDE design can produce an engine with a burn efficiency higher than other designs, with considerably fewer… …
54VTEC — is also an abbreviation for the verocytotoxin producing Escherichia coli strain O157:H7 .: For the education institution, see Virginia Tech. VTEC (Variable Valve Timing and Lift Electronic Control) is a valvetrain system developed by Honda to… …
55Low-energy vehicle — A Low energy vehicle is any type of vehicle that uses less energy than a regular petroleum fuel vehicle. Higher efficiency can be achieved by changing the vehicle s design, and/or by modifying its powertrain. Energy consumption as low as 5 12.5… …
56Cylinder head porting — refers to the process of modifying the intake and exhaust ports of an internal combustion engine to improve the quality and quantity of the air flow. Cylinder heads, as manufactured, are usually suboptimal due to design and manufacturing… …
57Rocket engine nozzle — A rocket engine nozzle is a propelling nozzle usually of the de Laval type used in a rocket engine to expand and accelerate the combustion gases, from burning propellants, so that the exhaust gases exit the nozzle at hypersonic… …
58Alcoholic beverage — A row of alcoholic beverages – in this case, spirits – in a bar. An alcoholic beverage is a drink containing ethanol, commonly known as alcohol. Alcoholic beverages are divided into three general classes: beers, wines, and spirits. They …
59Wood economy — The existence of a wood economy, or more correctly, a forest economy (since in many countries a bamboo economy predominates), is a prominent matter in many developing countries as well as in many other nations with temperate climate and… …
60Gas — This article is about the physical properties of gas as a state of matter. For the uses of gases, and other meanings, see Gas (disambiguation). Ga …
