Air-water integrated spray engine
An engine and quality injection technology, applied in the direction of machines/engines, jet propulsion devices, etc., can solve problems such as increased weight load, structural damage, unfavorable flight state maintenance, etc., to achieve increased flight range, excellent sealing effect, and improved fuel efficiency and the effect of thrust-to-weight ratio
Active Publication Date: 2022-05-31
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology
[0004] This prior art adds a water injection duct to the periphery of the ordinary turbofan jet engine. When in the air, the water injection duct does not work, which will increase the weight load, which is not conducive to maintaining the flight state.
In addition, when in water, since the jet propulsion system adopts sealing sheets to seal the internal passage, it is very difficult to obtain a good sealing effect for the annularly distributed sealing sheets, and it is difficult to achieve effective sealing of the internal passage. The probability of permanent water seepage is very high, so the jet propulsion system cannot enter the water to work within a few minutes after it stops, otherwise the high-temperature blades and other precision components will be instantly cooled once they encounter water, which will cause structural damage, and they need to stay on the water surface for a period of time before diving advance
Moreover, after the engine of this prior art floats to the water surface from the water, the jet propulsion system cannot be started immediately, and it is necessary to wait until the water infiltrated in the jet propulsion system is discharged before starting.
The switching delay of this mode of operation of the prior art is a very fatal flaw in wartime
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[0021] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings. Wherein, the same parts adopt the same reference numerals.
[0022] Such as Figure 1-3 As shown, on the basis of the existing jet aircraft engine, the present invention proposes an air-water integrated mass jet engine with an improved structure, which can be used both in air and in water. in, figure 1 Shown is a schematic view from the front of the engine; figure 2 Shown is a schematic view from the rear of the engine; image 3 For clarity, the upper and lower parts show two different states of propulsion in air and water, respectively.
[0023] As shown in the figure, the air-water integrated mass injection engine of the present invention includes an outer duct 1 and an inner duct 2, and the front and rear of the inner duct ...
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The invention discloses an air-water integrated jet engine which comprises an inner duct and an outer duct, a front outer duct propelling blade close to one end of an air inlet of the inner duct is arranged between the outer duct and the inner duct, and an air compressor blade corresponding to the outer duct propelling blade is arranged in the inner duct. Separating type connecting structures are arranged between the compressor blades and the outer duct propelling blades, and duct sealing structures are arranged at the front opening and the rear opening of the inner duct. According to the engine, the outer duct propelling blades serving as a main structure of underwater propelling can normally work and generate thrust during air propelling, so that dead weight cannot be formed, the fuel efficiency and the thrust-weight ratio during flying are greatly improved, and the flying range is favorably increased. In addition, elastic sealing films are adopted for front and back sealing of the inner duct, the sealing effect is excellent, the problem that high-temperature precision components are damaged due to water seepage does not need to be worried about, and the inner duct can be immediately lifted off after floating from water without waiting for draining of the seeping water.
Description
technical field [0001] The invention belongs to the field of propulsion engines, in particular to a dual-purpose engine capable of propulsion in air and water, and in particular to an air-water integrated mass injection engine. Background technique [0002] The engines used by aircraft flying in the air are generally called aeroengines, and the propelled mass is air. The density and compressibility of air are completely different from that of water, so aero-engines cannot directly use water instead of air as a spray mass to propel them in water. Cross-medium propulsion capability has great application value in military. [0003] CN 108891595 A discloses a trans-medium aircraft power device adopting a medium sensing device and duct sealing, including a jet propulsion system of a turbofan engine, which provides power for the aircraft in jet propulsion mode; the duct blades are propelled by water jet The system provides power for the aircraft in the water jet propulsion mode;...
Claims
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IPC IPC(8): F02K3/04
CPCF02K3/04
Inventor孙静杨广珺邓建志蒋锋安龙张素雯肖京平
OwnerNORTHWESTERN POLYTECHNICAL UNIV