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節(jié)流活門
水/甲醇環(huán)腔
膜盒組件
泄油
滑油開關(guān)
來(lái)自扭矩計(jì)系統(tǒng)
摔油圈
伺服活門
壓氣機(jī)第一級(jí)
最大流量
調(diào)整限動(dòng)釘
進(jìn)口導(dǎo)向葉片
Water injection
inlet air is reduced and consequently the air density and thrust are increased. If water only was injected, it would reduce the turbine inlet temperature, but with the addition of methanol the turbine inlet temperature is restored by the burning of methanol in the combustion chamber. Thus the power is restored without having to adjust the fuel flow.
4. The injection of coolant into the combustion chamber inlet increases the mass flow through the turbine, relative to that through the compressor. The pressure and temperature drop across the turbine is thus reduced, and this results in an increased jet pipe pressure, which in turn gives additional thrust. The consequent reduction in turbine inlet temperature, due to water injection, enables the fuel system to schedule an increase of fuel flow to a value that gives

圖17-3一個(gè)典型的壓氣機(jī)進(jìn)口噴水系統(tǒng)
an increase in the maximum rotational speed of the engine, thus providing further additional thrust, Where methanol is used with the water, the turbine inlet temperature is restored, or partially restored, by the burning of the methanol in the combustion chamber.
COMPRESSOR INLET INJECTION
5. The compressor inlet injection system shown in fig. 17-3 is a typical system for a turbo-propeller engine. When the injection system is switched on, water/methanol mixture is pumped from an aircraft-mounted tank to a control unit. The control unit meters the flow of mixture to the compressor inlet through a metering valve that is operated by a servo piston. The servo system uses engine oil as an operating medium, and a servo valve regulates the

6.控制裝置的高壓滑油開關(guān)控制桿與油門控制系統(tǒng)以這樣一種方式相互連接：油門移向起飛位置前，滑油開關(guān)是關(guān)閉的，是一節(jié)流活門也是關(guān)閉的，這就防止混合液流入壓氣機(jī)進(jìn)口。當(dāng)油門移動(dòng)到起飛位置時(shí)，才打開滑油開關(guān)，滑油壓力通過(guò)伺服活門后借助伺服活塞將節(jié)流活門打開。

微動(dòng)電門
水噴嘴
低壓水

高壓水

冷卻水

高壓空氣

滑油
燃油噴嘴
系統(tǒng)排放活門
節(jié)流活塞
排放活門
渦輪泵
排氣限制器
軸承冷卻水流
到燃油流量調(diào)節(jié)器
單向和水傳感活門
來(lái)自水箱
排放
通氣
單向活門
滑油箱
空氣冷卻水流量
空氣進(jìn)口限制器
排放活門
高壓壓氣機(jī)空氣
水流量傳感裝置
水切斷活門
Water injection
圖17-4 一個(gè)典型的燃燒室噴水系統(tǒng)
Fig. 17-4 A typical combustion chamber injection system.
supply of oil. The degree of servo valve opening is set by a control system that is sensitive to propeller shaft torque oil pressure and to atmospheric air pressure acting on a capsule assembly.
6. The control unit high pressure oil cock control lever is interconnected to the throttle control system in such a manner that, until the throttle is moved towards the take-off position, the oil cock remains closed, and thus the metering valve remains closed, preventing any mixture flowing to the compressor
inlet Movement of the throttle control to the take-off position opens the oil cock, and the oil pressure passes through the servo valve to open the metering valve by means of the servo piston.
COMBUSTION CHAMBER INJECTION
7. The combustion chamber injection system shown in fig. 17-4 is a typical system for a turbo-jet engine. The coolant flows from an aircraft-mounted tank to an air-driven turbine pump that delivers it to a water flow sensing unit. The water passes from the
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sensing unit to each fuel spray nozzle and is sprayed from two jets onto the flame tube swirl vanes, thus cooling the air passing into the combustion zone. The water pressure between the sensing unit and the discharge jets is sensed by the fuel control system, which automatically resets the engine speed governor to give a higher maximum engine speed.

8. The water flow sensing unit opens only when the correct pressure difference is obtained between 8.水流傳感裝置只在壓氣機(jī)出口空氣壓力和水壓之間獲得正常的壓差時(shí)才打開。當(dāng)發(fā)動(dòng)機(jī)油門桿移動(dòng)到起飛位置時(shí)，該系統(tǒng)才進(jìn)入工作狀態(tài)，使微動(dòng)開關(guān)工作并為渦輪泵選擇供氣量。
 
9.傳感裝置也作為一個(gè)單向活門，用以防止空氣壓力從噴水孔反饋回來(lái)，并在水流動(dòng)時(shí)，用指示燈亮來(lái)顯示它。
燃燒室噴水
 
7.圖17-4所示的燃燒室噴水系統(tǒng)是一個(gè)用于渦輪噴氣發(fā)動(dòng)機(jī)典型的系統(tǒng)。冷卻劑從安裝在飛機(jī)的水箱流入空氣驅(qū)動(dòng)的渦輪泵中，渦輪泵再把冷卻劑送到水流傳感器裝置。氺通過(guò)傳感裝置，流到每個(gè)燃油噴嘴并從每個(gè)噴嘴上的兩個(gè)噴水孔噴射到火焰筒漩渦葉片上，這樣便冷卻進(jìn)入到燃燒區(qū)域的空氣。在傳感裝置與噴水孔之間由燃燒控制統(tǒng)感測(cè)。它自動(dòng)調(diào)整發(fā)動(dòng)機(jī)轉(zhuǎn)速調(diào)節(jié)器，產(chǎn)生出一個(gè)更高的最大發(fā)動(dòng)機(jī)轉(zhuǎn)速。

Water injection
compressor delivery air pressure and water pressure. The system is brought into operation when the engine throttle lever is moved to the take-off position, causing microswitches to operate and select the air supply for the turbine pump.
　
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