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公开(公告)号：US20170335798A1
公开(公告)日：2017-11-23
申请号：US15520739
申请日：2015-10-19
申请人： SNECMA
发明人： Valentin HUE
摘要： A method of starting combustion of a space vehicle engine, the method comprising igniting a propellant tank heater (25); once the heater (25) has reached stable conditions, pressurizing a first tank (23) containing the first propellant and a second tank (24) containing a second propellant, and in parallel filling respectively a first igniter tank (13) with the first propellant in gaseous form and a second igniter tank (14) with the second propellant in gaseous form until ignition thresholds values of temperature (T13, T14) and of pressure (P13, P14) have been reached; and injecting the first and second propellants in gaseous form contained in the first and second igniter tanks (13 and 14) into an igniter (12) of the engine, so as to initiate combustion.
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公开(公告)号：US20160238141A1
公开(公告)日：2016-08-18
申请号：US15027188
申请日：2014-10-06
申请人： SNECMA
摘要： A method of designing a valve presenting an orifice of section that depends on the position of the valve member of the valve, which section can thus be controlled. The method includes determining a desired variation relationship for the flow section of the valve, which relationship defines a desired variation in the section as a function of time; setting a predetermined movement relationship for the valve member; and defining the shape of the fluid flow orifice in such a manner that, at each instant, if the valve member moves in compliance with the predetermined movement relationship, the flow section remains equal to the desired section. The method makes it possible to design a valve that is simple to control.
摘要翻译： 一种设计阀，其具有取决于阀的阀构件的位置的截面孔，从而可以控制该部分。 该方法包括确定阀的流动部分的期望的变化关系，该关系将部分中期望的变化定义为时间的函数; 为阀构件设定预定的运动关系; 并且以这样的方式限定流体流动孔口的形状，使得在每一时刻，如果阀构件按照预定的移动关系移动，则流动部分保持等于期望的区段。 该方法可以设计一个易于控制的阀门。
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