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18 条记录 (耗时 0.038 秒)

    Method and device for modulation of a flame
    1.
    发明授权
    Method and device for modulation of a flame 失效

    公开(公告)号：US06640549B1

    公开(公告)日：2003-11-04

    申请号：US10421186

    申请日：2003-04-24

    申请人： Kenneth J. Wilson ,  Kenneth H. Yu ,  Timothy Parr ,  Klaus C. Schadow

    发明人： Kenneth J. Wilson ,  Kenneth H. Yu ,  Timothy Parr ,  Klaus C. Schadow

    IPC分类号： F02C500

    CPC分类号： F02C5/00 ,  F02K7/02 ,  F05D2260/96 ,  F23M20/005 ,  F23R2900/00013 ,  F23R2900/03281

    摘要： 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.

    Solid fuel regression rate control method and device
    4.
    发明授权
    Solid fuel regression rate control method and device 失效
    固体燃料回归率控制方法和装置

    公开(公告)号：US06446427B1

    公开(公告)日：2002-09-10

    申请号：US09618412

    申请日：2000-07-18

    申请人： Kenneth Yu ,  Klaus C. Schadow ,  Kenneth Wilson ,  Timothy Parr

    发明人： Kenneth Yu ,  Klaus C. Schadow ,  Kenneth Wilson ,  Timothy Parr

    IPC分类号： C06D500

    CPC分类号： F02K7/105 ,  F02K9/26 ,  F05D2260/96 ,  F05D2260/962

    摘要： The present invention relates to a method and device for controlling the solid fuel regression rate of a solid fuel ramjet engine. In a preferred embodiment of the present invention, pressure oscillations are excited using active, closed-loop control to vary the heat transfer, and in turn the regression rate of a solid fuel ramjet engine. The pressure oscillations are excited by introducing small disturbances into the shear layer. The disturbances are amplified in the shear layer and excite pressure oscillations. The disturbances are introduced at a certain phase relative to the pressure oscillations. This is accomplished by closed-loop control. By varying the phase, the amplitude of the pressure oscillations can also be varied, which in turn will vary the heat transfer, regression rate, and thrust level.

    摘要翻译： 本发明涉及一种用于控制固体燃料冲压式喷气发动机的固体燃料回收率的方法和装置。 在本发明的一个优选实施例中，使用主动闭环控制来激发压力振荡，以改变传热，并且进而改变固体燃料冲压式喷气发动机的回归率。 通过在剪切层中引入小的扰动来激发压力振荡。 扰动在剪切层中被放大并且激发压力振荡。 在相对于压力振荡的某一阶段引入干扰。 这是通过闭环控制实现的。 通过改变相位，压力振荡的幅度也可以变化，这反过来将改变传热，回归率和推力水平。