Cold blocking of the channel in a gas-liquid mixer by hot fuel jets
This article examines cold blocking in a circular channel with separate feeds for the oxidant and fuel and diffusion burning on the latter. Jets of T-1 kerosene at a temperature of +20/sup 0/C were injected into a gas channel of a mixer with an internal diameter of 21 mm at angles of 60 and 90/sup 0/ and a distance of 28 mm from the lower end of the channel, which terminates in a step expansion into a combustion chamber of diameter 70 mm. The oxidizing gas at about 650/sup 0/C consists of 94% oxygen and 6% of products from the complete combustion of the fuel, and this enters the mixer from a reservoir. It is determined that a mixer blocked by a cold flow has the following advantages: pressure perturbations from the combustion chamber do not penetrate into the mixer and reservoir, and steady-state operation is provided in the mixer; the peripheral flow of cold gas protects the wall of the mixer from overheating and damage; deep jet penetration prevents the accumulation of fuel beyond the step, which reduces the combustion completeness; and the high longitudinal and transverse static-pressure gradients around the step greatly accelerate the mixing and favor a more uniform distribution of the fuel in the oxidant flow. It is concluded that a blocked mixer can be used to improve the working process in a combustion chamber.
- Research Organization:
- Leningrad
- OSTI ID:
- 6449353
- Journal Information:
- Combust., Explos. Shock Waves (Engl. Transl.); (United States), Vol. 19:3; Other Information: Trans. from Fizika Goreniya i Vzryva, Vol. 19, No. 3, pp. 77-81, May 1983
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
COMBUSTION CHAMBERS
MIXERS
KEROSENE
COMBUSTION
FLOW BLOCKAGE
CHANNELING
COMBUSTION PRODUCTS
DESIGN
DIFFUSION
DISTURBANCES
FUELS
GASES
INCIDENCE ANGLE
JETS
LIQUIDS
OXIDIZERS
OXYGEN
PRESSURE GRADIENTS
STEADY-STATE CONDITIONS
TEMPERATURE DEPENDENCE
WALLS
CHEMICAL REACTIONS
ELEMENTS
FLUIDS
LIQUID FUELS
NONMETALS
OXIDATION
PETROLEUM PRODUCTS
THERMOCHEMICAL PROCESSES
421000* - Engineering- Combustion Systems
025000 - Petroleum- Combustion