说New words

•        Extinction灭绝

•        Spread散布

•        Dual 二重的

•        Potential潜在的

•        Flammable易燃

•        Isolate孤立

•        Hotend 热端

•        Fuelsystem 燃油系统

•        Pipe 管道

•        Fireproof防火的

•        Bulkhead隔板、隔舱

•        Ventilate通风

•        Accumulation积累

•        Vapour蒸汽

•        Fireresistant 耐火的

•        Comply遵守

•        Explosionproof 防爆的

•        Spark 火花

•        Staticelectricity 静电

•        Fracture断裂

•        Drainage排水

•        Nacelle机舱、短舱

•        Bay 隔舱

•        Pod 吊舱

•        Seal 密封

•        Spontaneous自发的

•        Extinguishant灭火剂

•        Ejector喷射器

•        Purge 净化

•        Zonal 带状的

•        Calibration校准

•        Aperture  孔径

•        Drill 钻孔

•        Shortcircuiting  短路

•        Chafing摩擦

•        Ingress进入

•        Strategically战略上

•        Pre-formed预成型

•        Route 路线

•        Orifice孔口

•        Extractor提取器

•        Thermistor热敏电阻

•        Thermocouple热电偶

•        Electricalcontinuous element 电气连续元件

•        Amplifier放大器

•        E.M.F.电动势

•        Trigger触发

•        Pylon 塔架、塔柱

•        Fairing整流罩

•        Display显示器

•        Semi-conductormaterial 半导体材料

•        Capacitor电容器

•        Dielectric电介质

•        Voltagedifference  电压差

•        Capacitance电容

•        Stainlesssteel 不锈钢

•        Absorbent吸收剂

•        Loop 回路

•        Switch开关

•        Render基于、提供、回报

•        Surveillance监控

•        Detector探测器

•        Radiation辐射

•        Ultra-violetrays 紫外线

•        Infra-redrays 红外线

•        Cartridge墨盒、盒式存储器

•        Fuelcock 燃油旋塞

•        Situated位于

•        Re-establish重建

•        Freoncompounds 氟利昂化合物

•       Overheat 过热

读Sentence

•        1. Allgas turbine engines and their associated installation systems incorporatefeatures that minimize the possibility of an engine fire. It is essential,however, that if a failure does take place and results in a fire, there isprovision for the immediate detection and rapid extinction of the fire, and forthe prevention of it spreading. The detection and extinguishing systems mustadd as little weight to the installation as possible.

•        4. Allpipes that carry fuel, oil or hydraulic fluid, are made fire resistant/proof tocomply with fire regulations, and all electrical components and connections aremade explosion-proof. Sparking caused by discharge of static electricity isprevented by bonding all aircraft and engine components. This gives electricalcontinuity between all the components and makes them incapable of ignitingflammable vapour.

•        7.Spontaneous ignition can be minimized on aircraft flying at high Mach numbersby ducting boundary layer bleed air around the engine. However, if ignitionshould occur, this high velocity air stream may have to be shut off, otherwiseit would increase the flame intensity and reduce the effectiveness of theextinguishing system by rapid dispersal of the extinguishant.

•        9. Onsome engines a fireproof bulkhead is also provided to separate the 'cool' areaor zone of the engine, which contains the fuel, oil, hydraulic and electricalsystems, from the 'hot' area surrounding the combustion, turbine and exhaustsections of the engine. Differential pressures can be created in the two zonesby calibration of the inlet and outlet apertures to prevent the spread of firefrom the hot zone.

•        14.Both the thermocouple and thermistor detectors have properties making themideally suited to this application. The thermocouple comprises two dissimilarmetals which are joined together to form two junctions. As the temperaturedifference between the two junctions increases an E.M.F. is produced in thecircuit and it is this E.M.F. that triggers the fire warning displays.The thermistorconsists of a semi-conductor material whose resistance changes as temperatureincreases, with a corresponding change in the current flowing in the circuit.It is this change in the current that operates the warning indicators. Athermistor may be used as a single point detector or as a continuous elementsensor.

•        15.Another form of continuous element sensor takes the form of a capacitorconsisting of a tube containing a dielectric material with a conductor runningthrough the centre. A voltage difference is applied between the tube and thecentre conductor. As the temperature increases then the properties of thedielectric change with a corresponding change in the value of capacitance. Thischange of capacitance is displayed as a fire warning.

•        16.The gas filled detector consists of stainless steel tubing filled with gasabsorbent material and in the event of a fire or overheat condition thetemperature rise will cause the core of the sensing loop to expel the absorbedactive gas into the sealed tube causing a rapid increase in pressure. Thisbuild up of pressure is sensed by the detector alarm switch. Should the sensingloop become damaged causing a loss of the pressurized gas, an integrity switchwill indicate a detection loop fault on the appropriate engine. Fire indicationis given by a warning light and bell.

•        22.The extinguishant that is used for engine fires is usually one of the Freoncompounds. Pressurized containers are provided for the extinguishant and theseare located outside the fire risk zone. When the relevant electrical circuit ismanually operated, the extinguishant is discharged from the containers througha series of perforated spray pipes or nozzles into the fire (fig. 14-4). Thedischarge must be sufficient to give a predetermined concentration ofextinguishant for a period that may vary between 0.5 seconds and 2 seconds. Thesystem is generally one that enables two separate discharges to be made.

读全文并回答以下问题：

•       Whereshould we locate the potential sources of flammable fluids?

•       How toclassify the fire detection?

•       Forhigh Mach number situation, which kind of fire detection is more suitable?

•       Aftera fire has been extinguished, can the pilot restart the engine?

•       How to detect the engine overheat?

收看收听以下资源的12：50-27：23，并用英文回答以下问题，同时请将答案翻译成中文。