Showing papers on "Afterburner published in 1975"

Annular piston engine with afterburner and power turbine

Abstract: An internal combustion engine includes an annular or ring-type cylinder and piston therein; exhaust ports from the cylinder lead to an afterburner reactor situated generally medially of the annular cylinder; the exhaust gases are further burned within the afterburner section; to further reduce pollutants during the afterburning process, additional air is pumped into the afterburner section as by the ring piston due to its special configuration enabling it to accomplish, for example, triple functions such as: (a) to act as a power transmitting means, (b) to act as a pumping means to supply the engine's combustion chamber with scavenging air and/or an air-fuel mixture, and (c) to act as an air pumping means to supply desired quantities of ambient air into the afterburner section even in timed intervals with a constant predetermined pressure and predetermined quantities in order to thereby maximize the degree of control of the temperature generated in the afterburner and thereby more nearly fully oxidize the unburned fuel residues entering the afterburner. The ring piston is so constructed that it can be operatively connected to an output shaft as through the use of only a single crank, single connecting rod and wrist pin. Further, to extract a considerable amount of energy from the waste exhaust gases leaving the afterburner, a power turbine is provided which is within the exit path of the exhaust gases. The power turbine is conveniently incorporated as into the engine head and the turbine output shaft is either geared by reduction gear means to work in unison with the output crank shaft, or the turbine shaft rotates at an independent speed and is geared to drive (some or all of) the engine and/or vehicular accessories.

Countercurrent flow afterburner

Abstract: Afterburner apparatus for receiving from an incinerator products of combustion and distributing them through a domed distributor in counterflow manner throughout a housing, in opposition to a stream of combustible gas.

Multi-cylinder internal combustion engine

Abstract: At relatively low afterburner temperatures cylinders of an engine are separately fed with rich and lean mixtures, while at high speeds and excessive high afterburner temperatures the cylinders are fed with only the lean mixture.

Afterburner with combustion chamber and heat exchanger - has cylindrical combustion chamber arranged coaxially with heat exchanger with tubes

Abstract: The afterburner system is used for purification of waste gases and especially for elimination of smoke and smelling compounds. The afterburner unit is highly compact because the combustion chamber is arranged within the heat exchanger. The preferred version of the combustion chamber is cylindrical and the heat exchanger encloses the combustion chamber coaxially as a cylindrical envelope. The heat exchanger has a cluster of pipes. The central combustion chamber accommodates the afterburner flame. Hot gases from this tubular combustion chamber are ducted into an annular space around the combustion chamber and from there into the annular chamber which accommodates heat exchanger tubes. The tubes are held on support plates which impart a twisted path to the hot gases before they reach the outlet. Raw waste gas enters the heat exchanger and passes through the tubes and joins the flow into the burner.

Identification of Multivariable Gas Turbine Dynamics from Stochastic Input-Output Data.

Abstract: : Results directed toward the identification of multivariable gas turbine engine dynamics from stochastic input-output data are described. An identification algorithm based on modern state estimation theory was developed to identify the parameters of a linear time-invariant F100/F401 turbofan engine model. Unknown parameters of the F100/F401 model were introduced as auxiliary state variables thereby transforming the parameter identification problem to a nonlinear state estimation problem. The engine model was forced by commanded changes in main burner fuel flow and jet exhaust area. Gaussian noise was added to the commanded fuel flow to model metering valve uncertainties. Noise-corrupted measurements consisted of fan turbine inlet temperature, fan and compressor speeds, and main burner and afterburner pressures. The identification procedure was carried out at three steady-state design points between idle and military conditions.

Vortical flow afterburner device

Abstract: A vortical flow afterburner device for causing afterburning of engine exhaust gases by mixing air with same, in which the exhaust gas flow is supplied substantially tangentially into a precombustion chamber disposed on the upstream side of a reaction chamber for producing a vortical flow of the exhaust gases, this vortical flow being then supplied into the central portion of the reaction chamber, and air is supplied substantially tangentially into the reaction chamber to insure combustion of the exhaust gases.