Pulse detonation engine combustor and ignition method thereof

A technology of pulse detonation and engine, applied in the direction of machine/engine, rocket engine device, mechanical equipment, etc., can solve problems such as not being well solved, and achieve the effect of reducing size

Active Publication Date: 2019-08-16
NORTHWESTERN POLYTECHNICAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the methods to reduce the transition distance from slow ignition to detonation include Shchelkin spiral and other turbulence enhancement devices, or adopt some new ignition methods, such as: transient plasma ignitio

Method used

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  • Pulse detonation engine combustor and ignition method thereof
  • Pulse detonation engine combustor and ignition method thereof
  • Pulse detonation engine combustor and ignition method thereof

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Embodiment Construction

[0025] Embodiments of the present invention are described in detail below, and the embodiments are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0026] Such as figure 1 As shown, a pulse detonation engine combustion chamber in the present invention includes a main detonation chamber, a fuel nozzle and an air intake valve; the fuel nozzle is arranged on the wall or end surface of the main detonation chamber, and can spray into the main detonation chamber For fuel, the suction valve is arranged on the wall or end surface of the main detonation chamber, which can suck oxidizer or air into the main detonation chamber; the suction valve is a rotary valve, when the valve is opened, the oxidant or air required for combustion is introduced, when the valve When closed, the valve acts as a wall; the right end of the main detonation chamber is the outlet, which communicates with the outside world.

[0027] There...

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Abstract

The invention provides a pulse detonation engine combustor and an ignition method thereof. A large-size main detonation chamber is divided into a plurality of small-size zones, firstly the main detonation chamber is filled with air and fuel, then ignition is conducted with low energy in the first line of zone close to the left end wall of the detonation chamber, flame is accelerated to form hot jet flow large in energy and containing a large number of active groups in the small-size zone, and the hot jet flow enters the main detonation chamber; afterwards the jet flow collides with the left end wall face to cause shock focusing, flame speed is increased, and shock-wave strength is enhanced; and then through corresponding sequential control, mixed fuel in the second line of zone far away from the left end wall face is ignited with low energy, jet flow formed in the zone enters the main detonation chamber, and ignition energy is increased again. Compared with common ignition, the pulse detonation engine combustor and the ignition method thereof organically combine multipoint ignition, jet flow ignition, obstacle reinforcement turbulent flow, shock reflection focusing, small pipelineacceleration and other principles and methods, detonation waves can be generated in a shorter time and distance, and thus time and distance of DDT are shortened.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a pulse detonation engine combustion chamber and a detonation method thereof. Background technique [0002] Pulse detonation engine (PDE) is a self-pressurized (about 13-15 times) power device that uses high-temperature and high-pressure gas generated by pulse detonation waves to generate thrust, and can operate in a very wide flight Mach number range ( Ma=0~5), and can work efficiently at subsonic speed and supersonic speed. Pulse detonation engines are divided into air-breathing pulse detonation engines and rocket-type pulse detonation engines according to whether they have their own oxidant. In addition, the detonation combustion mode has the remarkable advantages of high thermal efficiency (49%) and fast combustion rate (2000m / s). The PDE with this technology has a high heat capacity, which enables the power plant to obtain greater unit thrust and lower fuel consumption. ...

Claims

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Application Information

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IPC IPC(8): F02K7/02F02K9/62F02K9/95
CPCF02K7/02F02K9/62F02K9/95
Inventor 王治武潘智刚黄晶晶伟力斯王亚非刘志
Owner NORTHWESTERN POLYTECHNICAL UNIV
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