China's First UAV Turbofan Engine Was Delivered Successfully, Integrating a Number of Key Technologi

As the Pearl on the crown of modern industry, aeroengine, the heart of aircraft, has always been a short board in China's aviation field. This short board is also applicable to the field of UAV. The engine of UAV seems easy to develop, but it is actually very difficult. At present, the smallest civil engine in the international aviation industry is about 2 tons, because most smaller fighters choose turboprop engines, and turbofans are not cost-effective compared with turboprop engines. But this is only different from civilian and military. Turbofan has great advantages in military aircraft.

On January 2, China's first UAV turbofan engine was manufactured and delivered to users in a private enterprise in Xi'an. According to relevant analysis, the engine is a 1000 kg turbofan engine developed by the Institute of Engineering Thermophysics of the Chinese Academy of Sciences for more than ten years. This turbofan engine is also the first 1000 kg thrust grade turbofan engine with completely independent intellectual property rights in China. It integrates many key technologies such as diagonal flow centrifugal combined compressor. It has the advantages of wide high-altitude flameout boundary, low fuel consumption, simple structure and high reliability. Its comprehensive performance index has reached the international advanced level.

As a systematic research institution of the Chinese Academy of Sciences, the Institute of Engineering Thermophysics has developed a turbofan engine outside the China aviation engine system for the first time, which is of great significance. The research and development of 1000 kg turbofan engine in the Institute of Engineering Thermophysics is an independent innovation from principle to trial production. From the practical point of view, the successful development of the small turbofan engine plays a role in improving the strength of our army, even comparable to the service of 20 series models such as Yun 20 and Zhi 20.

Take the pw500 turbofan engine of Pratt Whitney, which is closest to the engine power, as an example. The pw500 engine is 1.52 meters long; Fan diameter 0.70M; The self weight is 280 kg; The maximum thrust is 13.3 kn. Its installed objects include Cessna "certificate of merit" series; Ambway "Feihong" 300. In addition, general atomics' Avenger UAV also uses pw500 as power.

In the future, the engine can play a vital role in the following areas.

1. UAV

In recent years, the development of UAVs in China has shown a gratifying situation, with more development units, more models and booming production and marketing. China's UAV has even successfully surpassed the United States and Israel in the international market, occupying the first market position in the global military UAV market.

With the increase of UAV export, the bottleneck of UAV power in China has become more and more prominent. Because most UAV engines are controlled products and the import is limited, many UAV models in China can not find advanced and suitable engines in China, so they have to be equipped with old-fashioned piston or turbojet engines, The backward power pack seriously limits the combat performance of China's UAV, making it lag behind the corresponding UAV products of the U.S. military in terms of combat radius, dead time, flight altitude, fuel consumption, attendance and other indicators.

If the domestic UAVs are replaced with new small turbofans, all kinds of UAVs in active service in China will greatly make up for the above weaknesses, the performance will naturally become stronger and the competitiveness in the international market will be greatly improved.

2. Small aircraft

At present, there is still a blank in the development of advanced turbofan power for small aircraft in China. The market of small business jet is basically monopolized by western developed countries. The reasons for this result are inherent in the weak foundation of China's aviation development R & D and the lack of attention to relevant market factors, but the lack of small turbofan engine with performance matching is also one of the important reasons.

Nowadays, with the successful development of small turbofan engine in China, this bottleneck restricting the development has been broken through. With the opening of China's general aviation market, China's demand for small turbofan powered aircraft will rise rapidly in the future, and the successful development of 1000 kg turbofan engine just caught up with this historical opportunity, and the market demand in the future is very considerable.

3. Heavy long range cruise missile

At present, heavy long-range cruise missile has become an important weapon for long-range military attack after ballistic missile. With the successful development of China's 1000 kg turbofan engine and the train mounted cruise missile, China's cruise missile will have a stronger cruise missile power selection after being equipped with the 500 kg aef50e turbofan engine. After being equipped with the engine, the relevant cruise missile will have a stronger power system, which will enable the cruise missile to have a longer range and greater load, Better maneuverability.

Take the American "Tomahawk" missile as an example. The thrust of F107 turbofan engine equipped is only 300 kg. Therefore, for cruise missiles equipped with 1000 kg power, they must be super heavy cruise missiles that surpass Tomahawk. In addition to tactical value, such missiles will also have strategic significance and even nuclear warhead carrying capacity.

China's First UAV Turbofan Engine Was Delivered Successfully, Integrating a Number of Key Technologi 1

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Difference and Relationship Between Rated Power and Actual Power
Difference between rated power and actual powerRated power refers to the power of the electrical appliance during normal operation. Its value is the rated voltage of the appliance multiplied by the rated current. If the actual power of the consumer is greater than the rated power, the consumer may be damaged.Under normal operating conditions, the output power of power equipment or the input power of energy consuming equipment. It is often measured in kilowatts. It also refers to the power that the machine produced by the factory can achieve during normal operation. That is to say, the power of a machine, the rated power of the machine is certain, P = FV, so the force generated by the machine is inversely proportional to the running speed. For example, when the car is driving on a flat asphalt road, the traction force F required is smaller, and the speed per hour can be larger; When the road is uneven or uphill, the traction required is large, so you must drive at a low speed.Actual power is the energy consumed by electrical equipment per unit time in the actual power consumption process. For the same electrical appliance, the voltage engraved on the nameplate is the rated voltage of the electrical appliance. When the electrical appliance works under this voltage, the power obtained is the rated power. At this time, the actual power is numerically equal to the value of rated power. However, in most cases, the electric appliance will not work at this voltage, so when the voltage at both ends of the electric appliance is greater than or less than the rated voltage, the power of the electric appliance will increase or decrease with the change of voltage, and the power at this time is called the actual power.Difference between rated power and actual power of motorMotor rated power refers to the power marked on the motor nameplate, which indicates the maximum power allowed to be carried by the motor in a safe state. Actual power refers to the power driven by the motor during actual operation. The size is determined by the load and is equal to the product of actual current and actual voltage (AC motor also includes power factor); The actual power should be less than the rated power, and the motor operation is safe. Their relationship is:Rated power = rated current in * rated voltage un * root 3 * power factorActual power = actual current in * actual voltage un * root 3 * power factorDifference between rated power and actual powerFor example, "pz220v40w" and "3.8v0.3a" refer to the rated value of the appliance, and the rated value is before the appliance leaves the factory " When e is determined, it is unique. That is, regardless of whether the electrical appliance works normally in the actual circuit, the rated value is fixed. The actual values such as actual power, actual voltage and actual current refer to the actual current, voltage and power when the electrical appliance works in the actual circuit. The actual value of the electrical appliance will change with the actual circuit conditions, and the same power The actual value of the device is often different in different actual circuits. Even in the same circuit, its actual value may change at different times.For example, a "220v40w" incandescent lamp is connected to a 220 V home circuit. Since the actual voltage at both ends is 220 V, which is just equal to its rated voltage, it is working normally at this time (normal working time) Its actual power is equal to its rated power of 40W: if the actual voltage at both ends of the bulb is greater than 220V, its actual power will be greater than 40W; if the actual voltage at both ends of the bulb is less than 220V, its actual power will be less than 40W. These voltages and powers are the actual voltage and power.It can be seen that the actual power of electrical appliances may change continuously due to the change of actual voltage (for example, the power supply voltage of home circuit may be as high as 250V or as low as 160V, etc.) , when the actual voltage is just enough for the electrical appliance to work normally, the actual value at this time is also called the rated value, so the rated value is the actual value when the electrical appliance works normally, that is to say, the rated value is a special actual value
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