風(fēng)扇及助推器提供兩個(gè)隔離的氣流，主氣流通過(guò)風(fēng)扇轉(zhuǎn)子內(nèi)部，接著穿過(guò)助推器、發(fā)動(dòng)機(jī)主體及低壓壓氣機(jī)，從排放噴嘴核心排出。次級(jí)氣流通過(guò)風(fēng)扇外部從風(fēng)扇排氣管道噴出。風(fēng)扇安裝于發(fā)動(dòng)機(jī)前端，其主要功能是給氣流加速引導(dǎo)氣流到發(fā)動(dòng)機(jī)次級(jí)氣流噴嘴。這樣產(chǎn)生的動(dòng)力占發(fā)動(dòng)機(jī)總推力的 78%。

(5) Fuel is delivered to the fuel nozzles at pressure and flow-rate required to obtain the desired engine thrust. Fuel is pumped from the fuel tank and enters through the engine fuel shutoff valve. The engine fuel shutoff valve is controlled by the engine start lever and the engine fire warning switch. When the engine fuel shutoff valve is closed ,the FUEL VALVE CLOSED light located on the forward overhead panel illuminates dim.

燃油根據(jù)發(fā)動(dòng)機(jī)推力的需求在壓力作用下流到燃油噴嘴。燃油在油箱中用泵抽出并流過(guò)燃油關(guān)斷活門(mén)。發(fā)動(dòng)機(jī)燃油關(guān)斷活門(mén)由發(fā)動(dòng)機(jī)起動(dòng)手柄和發(fā)動(dòng)機(jī)火警開(kāi)關(guān)控制。當(dāng)發(fā)動(dòng)機(jī)燃油關(guān)斷活門(mén)關(guān)閉時(shí)，位于前頂置面板上的“ FUEL VALVE CLOSED”燈燃亮。

(6) Fuel passes from the first stage of the engine driven fuel pump through a fuel/oil heat exchanger to a filter. Provisions are made to bypass the filter in the event of failure or blockage. The second stage of the fuel pump provides high pressure fuel to the main engine control(MEC). As the fuel leaves the second stage fuel pump, it passes through another filter where a portion of the fuel is ported to a servo fuel heater before entering the MEC. The servo fuel heater uses engine oil to heat the servo fuel to prevent icing of control mechanisms control(PMC) uses power lever angle, fan inlet pressure and temperature, N1 rpm and N2 rpm to meter the correct amount of fuel to the combustor. A fuel-flow transmitter measures the rate of fuel flow from the MEC and provide a signal to the fuel flow indicator.

燃油從第一級(jí)發(fā)動(dòng)機(jī)驅(qū)動(dòng)燃油泵中通過(guò)燃油 /滑油熱交換器到一個(gè)油濾。當(dāng)油濾萬(wàn)一失效或堵塞時(shí)將被旁通。燃油泵的第二級(jí)提供高壓燃油給主發(fā)動(dòng)機(jī)控制器。當(dāng)燃油離開(kāi)燃油泵第二級(jí) ,流到另一個(gè)油濾，在那里，一部份燃油在進(jìn)入主發(fā)動(dòng)機(jī)控制器前前轉(zhuǎn)到一個(gè)伺服燃油加熱器。這個(gè)伺服燃油加熱器用發(fā)動(dòng)機(jī)滑油加熱伺服燃油以防止控制機(jī)械內(nèi)部主發(fā)動(dòng)機(jī)控制器結(jié)冰。主發(fā)動(dòng)機(jī)控制器與電源管理控制器相連，用動(dòng)力桿角度、風(fēng)扇入口壓力及溫度、 N1轉(zhuǎn)速和 N2轉(zhuǎn)速來(lái)測(cè)量燃燒室燃油量。燃油流量傳感器從主發(fā)動(dòng)機(jī)控制器測(cè)量燃油流率并為燃油流量指示器提供信號(hào)。

(7) The oil system is pressurized by the engine driven oil pump. The oil leaves the oil pump, where sensors for oil pressure and the LOW OIL PRESSURE switch are located, passes through an oil filter and continues to the engine bearing and gearbox, the oil is returned to the oil tank by means of engine driven scavenge pump. From the scavenge pumps the oil passes through a scavenge filter. Bypass valve is mounted to prevent filter from blocking. scavenge oil temperature is sensed as the oil returns to the scavenge pump. The oil then passes through the servo fuel heater and fuel/oil heat exchanger where it is cooled by fuel before returning to the

oil tank.

滑油系統(tǒng)通過(guò)發(fā)動(dòng)機(jī)驅(qū)動(dòng)的滑油泵增壓�；�油離開(kāi)裝有滑油壓力傳感器及“ LOW OIL PRESSURE”開(kāi)關(guān)的滑油泵，流向一個(gè)滑油油濾并流到發(fā)動(dòng)機(jī)軸承及齒輪箱�；�油通過(guò)發(fā)動(dòng)機(jī)驅(qū)動(dòng)的回油泵回到滑油箱。從回油泵返回的滑油流經(jīng)一個(gè)油濾，旁通活門(mén)用來(lái)防止油濾堵塞。當(dāng)滑油回到回油泵時(shí)，通過(guò)一個(gè)傳感器來(lái)感受回油滑油溫度，然后，滑油通過(guò)伺服燃油加熱器及燃油 /滑油熱交換器，在這，滑油在回到滑油箱之前被燃油冷卻。