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    • 3. 发明授权
    • Acoustic oscillatory pressure control for ramjet
    • 压路机的声振荡压力控制
    • US4760695A
    • 1988-08-02
    • US65483
    • 1987-06-23
    • Robert S. BrownRoger Dunlap
    • Robert S. BrownRoger Dunlap
    • F02K7/10F02K9/26
    • F02K7/105F02K9/26
    • The periodic shedding of vortices produced in a highly sheared gas flow, such as that encountered at the grain transition boundary in a solid propellant rocket motor or at the combustor inlet to a ramjet engine, is a significant source of acoustic instability which may result in unstarting of the ramjet engine or excessive vibration of the rocket motor. By restricting the transition boundary or combustor inlet at the sudden expansion dump plane (5), such as by locating an orifice plate (13) at the dump plane, the gas flow is separated upstream and produces a vena contracta downstream of the orifice, inhibiting the feedback of acoustic pressure to the point of flow separation and preventing the formation of organized oscillations. Incorporation of such a simple thin plate orifice at the dump plane reduces the periodic acoustic oscillations and thereby controls the detrimental oscillatory pressure fluctuations.
    • 在高度剪切的气流中产生的涡流的周期性脱落,例如在固体推进剂火箭发动机中或在燃烧器入口处在冲压喷气发动机处遇到的涡流,是声学不稳定的重要来源,这可能导致不起动 的冲压发动机或火箭发动机的过度振动。 通过在突出膨胀倾卸平面(5)处限制过渡边界或燃烧器入口,例如通过在排放平面处设置孔板(13),气流在上游被分离,并在孔的下游产生静脉收缩,抑制 声压反馈到流动分离点,防止形成有组织的振荡。 这种简单的薄板孔口在转储平面处的结合减少了周期性声振荡,从而控制了有害的振荡压力波动。
    • 4. 发明授权
    • Gun-launched variable thrust ramjet projectile
    • 枪式推力可变推力冲击射弹
    • US4502649A
    • 1985-03-05
    • US495203
    • 1983-05-16
    • Leo BotwinJohn A. Simpson
    • Leo BotwinJohn A. Simpson
    • F02C7/057F02K7/10F42B10/38F42B15/00F42B15/10
    • F02C7/057F02K7/105F42B10/38F42B15/00
    • A gun-launched ramjet projectile follows a classical vacuum ballistic trajectory by maintaining a thrust-drag balance. The thrust of the ramjet is varied by an air door which bleeds air from the duct that leads from the supersonic diffuser at the front of the projectile to the combustion chamber. The control system for the air door includes an actuator and a pair of accelerometers, the output of which is integrated to provide an indication of velocity. The first accelerometer operates during the launching of the projectile in the gun to measure the launch velocity. A second, and more sensitive, accelerometer measures in-flight velocity changes due to atmospheric conditions. Both of the measured velocities are compared with prerecorded standards and error signals are derived representing any velocity deviations. These error signals are combined and then used to drive the air doors which varies the thrust of the ramjet so that it follows the classical vacuum ballistic trajectory.
    • 喷枪式冲压射弹遵循经典的真空弹道轨迹,通过保持推力 - 阻力平衡。 冲压喷气机的推力由一个空气门变化,空气门将导管的空气从喷射器前部的超音速扩散器引导到燃烧室。 用于空气门的控制系统包括致动器和一对加速度计,其输出被一体化以提供速度指示。 第一个加速度计在炮弹发射时测量发射速度。 第二个更敏感的加速度计测量由于大气条件的飞行中速度变化。 将所测量的速度与预先记录的标准进行比较,并且导出代表任何速度偏差的误差信号。 将这些误差信号组合起来,然后用于驱动改变冲压喷气机推力的气门,使其符合经典的真空弹道轨迹。
    • 9. 发明授权
    • Propulsion from combustion of solid propellant pellet-projectiles
    • 固体推进剂丸粒喷射燃烧的推进
    • US06968676B1
    • 2005-11-29
    • US10280968
    • 2002-10-25
    • Vinu B. Krishnan
    • Vinu B. Krishnan
    • C06B45/00C06B47/02F02C3/26F02K7/10F02K9/10F02K9/72F02K9/95
    • F02K9/10C06B45/00C06B47/02F02C3/26F02K7/105F02K9/72F02K9/95
    • Propulsion from combustion of solid propellant pellet-projectiles for providing a useful propulsion that has the advantages of both solid and liquid propulsion engines, and also can make use of either solid chemical propellants or fissionable nuclear material as the fuel. Preferred methods and systems can include a storage chamber for storing solid propellant pellets, a feeding system having a pellet feeding channel and a pellet feeding mechanism connected to the storage chamber and to a gun assembly, which is positioned along a longitudinal axis to eject the pellets at a certain velocity. A triggering system positioned between gun assembly and thrust chamber can initiate the propellant pellet-projectile, and a thrust chamber having a combustion chamber for combustion of propellant pellet-projectile with an exhaust nozzle. Additionally, an auxiliary power system can be used to power the components and various electrical and electronic systems that may be present in the invention for controlling the engine components. The gun assembly may include an ejector mechanism for ejecting the propellant pellets through at least one barrel. The triggering system can produce a medium creating an ambience for the initiation of propellant pellet-projectiles. Methods and systems can be used for space and rocket crafts, turbojets and ramjets.
    • 用于提供固体和液体推进发动机优点的有用推进剂的固体推进剂丸粒 - 射弹的燃烧推进,也可以利用固体化学推进剂或可裂变核材料作为燃料。 优选的方法和系统可以包括用于储存固体推进剂颗粒的储存室,具有颗粒进料通道的进料系统和连接到储存室的颗粒进料机构和沿着纵向轴线定位以喷射颗粒的喷枪组件 以一定的速度。 位于枪组件和推力室之间的触发系统可以启动推进剂丸粒抛射体,以及具有用于燃烧推进剂丸粒 - 抛射体与排气喷嘴的燃烧室的推力室。 此外,可以使用辅助动力系统为组件以及本发明中可能存在的用于控制发动机部件的各种电气和电子系统供电。 枪组件可以包括用于通过至少一个筒喷射推进剂丸粒的喷射器机构。 触发系统可以产生介质,为引发推进剂丸粒射弹创造一个氛围。 方法和系统可用于太空和火箭工艺,涡轮喷气发动机和雷击。