时间：2011-06-14 21:26来源：蓝天飞行翻译 作者：航空 点击：次
|
客趁高度开始于起飞高度。当飞机爬升时，环境压力减小，高度越高，压力越低。飞机内部高度（坐舱高度）也以一个低于飞机的速率爬升。增压系统提供客舱与外界环境之间的压力差。 (4) The airplane altitude above sea level is determined by measuring the pressure of the ambient atmosphere. For example, see figure4-3, at 30,000 feet above sea level the ambient pressure would be 4.36 psi. the cabin altitude can be measured by adding the ambient pressure to the 7.80 psid maintained in side the airplane by the pressurization system: ambient pressure 4.36 psi at 30,000 ft. Pressuree diffeential 7.80psid 12.16psi by referring to the chart depicting ambient pressure versus altitude, if the ambient pressure is 12.16psi, the cabin altitude would be 5150 ft (see sigure 4-3). 飞机高度可通过测量环境大气的压力来测得。例如：图 4-3，在高于海平面 3万英尺的环境压力为 4.36PSI。客舱高度可通过环境压力加 7.8PSID来测得， 7.8PSID由增压系统保持：环境压力： 4.36PSI 30000FT压力差； 7.8PSID坐舱压力： 4.36+7.8=12.16PSID参照图表描述环境压力高度曲线，如果环境压力是 12.16PSID，客舱高度将是 5150英尺（图 4-3） (5) the cabin pressure is referred to as “psid” and indicates the differential pressure, in pounds per square inch , between inside and outside of the airplane. There are many systems for measuring pressure and “psi” is only one .airplane systems measure pressure in inches of mercury and millibars; these indications are identical to 14.7psi as a measurement of the pressure exerted by the atmosphere at sea level. 客舱压力被称为“ PSID”并用“磅 /英尺”指出压力差，在飞机内外，有许多系统可测量压力，“ PSI”只是其中之一。飞机系统用英寸水银或毫巴来测量压力；这些指示等同于受到海平面大气压力 14.7PSI。 (6) The pressure control systems provide cabin differential pressure by controlling the outflow of air from the faselage. The pressure control system consists of an aft outflow valve, forward outflow valve, pressure controller, control panel, pressure sensing inputs, and monitoring indicators. 压力控制系统通过控制机外气流来提供客舱压力差。压力控制系统包括一个外流阀、前外流阀、压力控制器、控制面板、压力传感器和监视器。 (7) The aft outflow valve allowing cabin air to exhaust overboard to maintain cabin pressure. The forward outflow valve receives a control signal from the aft outflow valve . when the aft outflow valve is closed, the forward outflow valve receives a signal to drive full closed.
|
上一篇：航空维修专业英语汇编
下一篇：民航英语维修词汇
