-
公开(公告)号：US4967636A
公开(公告)日：1990-11-06
申请号：US389747
申请日：1989-08-04
IPC分类号： F41H11/14
CPC分类号： F41H11/14
摘要： The invention provides a system for breaching a lane in a minefield containing pressure sensitive mines. A mobile carrier mounts fuel, nitrogen and water tanks, a hose magazine and a launch rail. A flexible hose is folded into the magazine for rapid deployment therefrom and carries a detonating cord therein. A tow vehicle, such as a rocket, is connected to the free end of the hose so that when it is launched it will pull the hose across the minefield. Thereafter, pressurized nitrogen is used to drive liquid fuel into the hose, followed by a slug of water between the fuel-containing section and the carrier. Detonation of the cord creates a fuel droplets-in-air-cloud above the hose, which cloud is subsequently detonated to create a pressure wave which, in turn, detonates or neutralizes the mines along the desired lane, allowing vehicles and personnel to travel therealong. Means are provided to space the detonating cord from the inner wall of the hose so as to prevent the formation of hot spots as the cord detonates, which hot spots could result in premature local deflagration of the fuel droplet-air cloud.
-
公开(公告)号：US4355507A
公开(公告)日：1982-10-26
申请号：US162931
申请日：1980-06-25
CPC分类号： F02K1/822 , Y02T50/675
摘要： Film cooling apparatus adapted to be connected into a conduit carrying a hot exhaust gas. The apparatus comprises single walled contoured duct means connectible to said conduit and a center-body aerodynamically shaped and supported within said duct means so as to form therewith an annular channel of zero pressure gradient. Slot means are provided in the single walled contoured duct means and in the center-body to enable a flow of cooling air over exterior surfaces thereof to maintain said surfaces at an acceptably low temperature. A network of ducting carries the cooling air to the contoured duct means and interior of the center-body. The duct means and center-body are preferably of circular cross-section taken orthogonally of the overall flow direction. The center-body is an axisymmetric bulb having annular slots for directing the cooling air over the exterior of said bulb. The center-body connects with a plenum chamber formed by said single walled duct means and an exterior section of the network of ducting. The plenum chamber is also connected to a source of cooling air. An entraining diffuser is connected to said contoured duct means downstream of the center-body. Slots in the center-body, duct means and entraining diffuser are preferably from about 0.25" to about 0.750" in width.
摘要翻译： 适于连接到携带热废气的导管中的薄膜冷却装置。 该装置包括可连接到所述管道的单壁轮廓管道装置和空气动力学形状并被支撑在所述管道装置内的中心体，以便与其形成零压力梯度的环形通道。 狭槽装置设置在单壁波纹管道装置和中心体中，以使冷却空气能够在其外表面上流动，以将所述表面保持在可接受的低温度。 管道网络将冷却空气运送到轮廓管道装置和中心体的内部。 管道装置和中心体优选为与整个流动方向垂直的圆形横截面。 中心体是具有用于将冷却空气引导到所述灯泡外部的环形槽的轴对称灯泡。 中心体与由所述单壁管道装置形成的增压室和管道网络的外部部分连接。 增压室也连接到冷却空气源。 夹带扩散器连接到中心体下游的所述轮廓管道装置。 中心体，管道装置和夹带扩散器中的狭槽的宽度优选为约0.25“至约0.750”。
-
公开(公告)号：US5253585A
公开(公告)日：1993-10-19
申请号：US874105
申请日：1992-04-27
CPC分类号： B21D39/042 , E21B29/02 , E21B29/08 , F42D1/00
摘要： A main charge of explosive is positioned symmetrically about a passageway-forming tubular member, such as a well pipe assembly. The charge is outwardly and radially spaced from the member and is coupled thereto by a dense medium, such as soil, which is adapted to transfer the produced explosive energy to the tubular member in the form of a pressure pulse applied by the medium. Initiation charges are supplied at the outer surface of the main charge, to initiate a detonation wave directed at the tubular member. A layer of dense medium is provided to confine the non-coupled surface of the charge and retard venting of explosive gases away from the tubular member. In the end result, concentrated, converging pressure pulses are applied to the tubular member on detonation, to cause it to be symmetrically crimped to restrict the passageway.
摘要翻译： 爆炸物的主要装置围绕诸如井管组件的通道形成管状构件对称地定位。 电荷向外并与构件径向间隔开并且通过诸如土壤的致密介质与其耦合，其适于以由介质施加的压力脉冲的形式将所产生的爆炸能量转移到管状构件。 在主电荷的外表面处提供起始电荷，以引发指向管状构件的引爆波。 提供一层致密的介质以限制电荷的非耦合表面并阻止爆炸性气体远离管状构件的排放。 最终结果是，在引爆时将集中的会聚压力脉冲施加到管状构件，以使其对称地卷曲以限制通道。
-
公开(公告)号：US5317866A
公开(公告)日：1994-06-07
申请号：US946228
申请日：1992-09-18
摘要： A relatively low drag, completely free-flying, tubular vehicle comprises a body that defines a leading edge and a trailing edge and includes an external surface and an internal surface each extending from the leading to the trailing edge. The internal surface has an axially converging upstream section extending from the leading edge to a discontinuity that constitutes a throat in the vehicle. The internal surface also has an axially diverging downstream section extending from the throat to the trailing edge. The internal surface is configured to enable introduction and mixing of fuel into an airstream flowing therethrough, and to generate a shock wave when in flight. The shock wave is of such magnitude and direction as to create a hot spot that subsequently causes ignition and combustion of the fuel-air mixture. The combustion causes formation of a detonation bubble and migration of the associated wave front upstream to stabilize slightly downstream of the throat. The combustion of the fuel results in rapid expansion of combustion products, generating forward thrust against the internal surface of the vehicle.
摘要翻译： 相对较低的阻力，完全自由飞行的管状车辆包括限定前缘和后缘的主体，并且包括外表面和内表面，每个内表面从前缘延伸到后缘。 内表面具有从前缘延伸到在车辆中构成喉部的不连续部分的轴向会聚的上游部分。 内表面还具有从喉部延伸到后缘的轴向发散的下游部分。 内表面构造成能够将燃料引入和混合到流过其中的气流中，并且在飞行中产生冲击波。 冲击波具有如此大的程度和方向，以产生随后引起燃料 - 空气混合物点火和燃烧的热点。 燃烧引起爆炸泡的形成和相关的波前向上游的迁移，以在喉部稍微下游稳定。 燃料的燃烧导致燃烧产物的快速膨胀，产生抵靠车辆内表面的向前推力。
-
-
-
搜索结果
4 条记录 (耗时 0.012 秒)