IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0308985
(2002-12-03)
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발명자
/ 주소 |
- Wilson, Kenneth J.
- Yu, Kenneth H.
- Parr, Timothy
- Schadow, Klaus C.
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출원인 / 주소 |
- The United States of America as represented by the Secretary of the Navy
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
3 인용 특허 :
11 |
초록
▼
This invention relates to air breathing engines, such as ramjets, scramjets and internal combustion, and more particularly to an active combustion control device for a combustor. In more particularity, the present invention relates to a method and apparatus that applies active combustion control tec
This invention relates to air breathing engines, such as ramjets, scramjets and internal combustion, and more particularly to an active combustion control device for a combustor. In more particularity, the present invention relates to a method and apparatus that applies active combustion control technology to advanced propulsion devices and closed-loop fuel injection at sub-harmonic frequencies of the instability frequency of the combustor. The problem of limited actuator frequency response is addressed by injecting fuel pulses at sub-harmonic frequencies of the instability. The fuel may be liquid, solid or gas. To achieve this desired result, a closed loop controller is designed to determine sub-harmonic frequencies using a divider to divide the instability frequency of a combustor, yielding a fraction of the harmonic frequency. Also, this invention also combines open loop injection control with closed loop injection control to obtain enhanced engine performance, which includes extension of the stable combustion zone.
대표청구항
▼
This invention relates to air breathing engines, such as ramjets, scramjets and internal combustion, and more particularly to an active combustion control device for a combustor. In more particularity, the present invention relates to a method and apparatus that applies active combustion control tec
This invention relates to air breathing engines, such as ramjets, scramjets and internal combustion, and more particularly to an active combustion control device for a combustor. In more particularity, the present invention relates to a method and apparatus that applies active combustion control technology to advanced propulsion devices and closed-loop fuel injection at sub-harmonic frequencies of the instability frequency of the combustor. The problem of limited actuator frequency response is addressed by injecting fuel pulses at sub-harmonic frequencies of the instability. The fuel may be liquid, solid or gas. To achieve this desired result, a closed loop controller is designed to determine sub-harmonic frequencies using a divider to divide the instability frequency of a combustor, yielding a fraction of the harmonic frequency. Also, this invention also combines open loop injection control with closed loop injection control to obtain enhanced engine performance, which includes extension of the stable combustion zone. irst material, with said first material, said apparatus comprising: a) a vessel having a wall defining an interior with first and second ports providing fluid access to said vessel interior; b) a porous plate positioned within said vessel interior and upon which a quantity of said first material may be deposited and supported thereby, said porous plate having a porosity sufficient to enable passage of said dry gas and said product material therethrough yet prevent passage of said first material therethrough; c) a cover for hermetically sealing said vessel prior to delivery of said product material therein; d) a stand upon which said vessel is pivotally mounted to enable selective inversion of said vessel with respect to said stand: whereby a source of dry gas is deliverable through said first port, through said porous plate and through said first material to create a fluidized bed of said first material within said vessel interior and thereby dry said first material, and thereafter a quantity of said product material is deliverable under pressure through said second port, through said dry first material, through said porous plate, and exit said vessel through said first port. 9. The apparatus of claim 8, wherein said vessel comprises an outer cylindrical wall, a bottom wall, and an open top upon which said cover may be removably sealed, said first port being formed in said bottom wall and said second port being formed in said cover. 10. The apparatus of claim 9 wherein said porous plate is positioned in a spaced, parallel plane with respect to said vessel bottom wall. 11. The apparatus of claim 9, and further comprising a mesh cover for placing over said open top during drying of said first material. 12. The apparatus of claim 8, and further comprising a heating element for removably positioning in said vessel interior with said first material during delivery of said dry gas through said first port and into said vessel. 13. The apparatus of claim 8, wherein said first material is alumina, and said product material is monomer. 14. The apparatus of claim 8 wherein said porous plate is formed of sintered stainless steel.
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