Before returning to the college entrance examination, I became popular in the science circle

Chapter 296 Change of Cycle

The information was constantly tumbling and refining in Wu Tong's mind. Wu Tong took out the draft paper and wrote down on it one by one the technical essence reference directions she extracted and the shortcomings they wanted to overcome.

If the fan has defects, the reserve of super blade materials currently developed by WS-15S should be able to basically cover this defect and prevent it from becoming a roadblock to technical breakthroughs.

If the wake flow is too high, this still needs to be solved from the engine itself. If the problem of high wake flow cannot be solved, their ultra-high temperature resistant coating, reinforced coating, and new super roadbed material combination can overcome this shortcoming. technology reserves as alternatives, or in combination.

The engine is too big and the engine is too heavy. These are the top two problems that need to be solved urgently.The engine must be modest and not occupy too much space, and must make important space for increasing the bomb load.

Similarly, the engine's own weight cannot be too heavy, which is almost directly proportional to its excessive size.While the volume is reduced, the weight will naturally not increase but will automatically decrease!

In fact, at the current level of science and technology, the basic performance of the WS-15S is already superior enough. However, the foundation of the WS-15 is only developed based on conventional take-off and landing fighters and cannot be used directly.

If you want to apply it to STOVL fighters, you still need to go one step further on this basis and let it break through the current status quo of ST0VL fighter jets with a combat radius of less than [-] kilometers.

The Chinese sea area is vast, and the combat radius is too narrow, which is really useless.It’s not that there is no value in investing significant funds. Although it is necessary, money must always be spent wisely and cannot be wasted.

In particular, compared with the current J-20's 20 kilometers plus range and the H-[-]'s basic range of [-] kilometers, the combat radius is ten times twenty times three hundred kilometers, which makes it even more pitiful. .

On the battlefield, things are changing rapidly. The tanker relies on tankers to continue working and the combat radius is narrow... These are all fatal in a battle. Without changes, they have no practical significance.

Breakthrough is imperative. How can we make the same tank of fuel only fly 300 kilometers after the original engine is operated with super maneuverability? If the full bomb load is used, it must be reduced accordingly and optimized to be able to fly Tenfold increase, starting from [-] kilometers, or even more combat radius?
Various ideas passed through Wu Tong's mind one by one. As if he had a premonition, Wu Tong unconsciously drew a circle, and this circle attracted Wu Tong's eyes at the same time, and the lantern of inspiration lit up in Wu Tong's mind!
Circle, circumference.What goes around and over again is the movement of heaven.

Over and over again, cycle over, cycle, cycle, change...change cycle!
Yes, it is a cycle.

Wu Tong's eyes lit up, and the storm in his mind stirred up waves, convolving more continuous thoughts, and began to build building blocks to gather more clues for breakthroughs.

The thermal cycle characteristics of traditional aviation turbine engines are fixed. Traditional turbofan engines must make a trade-off between high thrust and high efficiency when designing. They cannot have both, nor can they switch at any time.
An engine can only operate in one mode and has the best performance only within a limited flight range.This traditional model cannot meet the consumption of short vertical takeoff and super maneuverability, so can she change this tradition?
Variable Cycle Engine, VCE, is a concept theory proposed in the 60s and [-]s.

At that time, with the advent of the turbofan engine, its superior subsonic performance and high propulsion efficiency made engine designers continue to pursue engines with larger bypass ratios.In the supersonic flight state, since the fuel consumption rate of a turbofan engine with a large bypass ratio is significantly higher than that of a turbofan engine with a small bypass ratio of the same thrust level, the further increase in the bypass ratio of the supersonic aircraft engine is limited. In order to make aviation The engine has good performance at both subsonic and supersonic speeds, and the concept of VCE variable cycle engine was born.

As fighter aircraft technology continues to improve, the flight envelope of fighter aircraft continues to expand. After the 80s, the world began to pay more attention to the integrated design of the aircraft body/propulsion system. Since the advantages of variable cycle engines in meeting the above indicators are particularly obvious, therefore, for military use -Research on variable-cycle engines for fighter jets is gradually being carried out.

Domestic research in this field cannot be said to have zero blanks, but it is not much better than this aspect. It can only be said to be in the budding state. Wu Tong has seen some fragments of this aspect in confidential information. There is not much information and room for reference.

Wu Tong did not think of this plan at the very beginning, until she drew a circle in her mind and thought of the cycle, and then pulled out the concept of changing the cycle from the depths of her memory.

However, this is not something that Wu Tong needs to worry about.For her, having a clear direction is the most important thing. The rest is just filling in the basics step by step. Especially, she has the assistance of absolute deduction.

"Brother Lu, I have a direction for engine optimization. Help me inform Brother Cai to arrange an extension for my return to school!" Wu Tong didn't even raise his head. He seemed to be reflexively asking Lu Xiao to convey the instructions to her, and also gave him the instructions by the way. Lu Xiao, good news about definite progress.

Almost as soon as he finished speaking, Wu Tong entered a state of focused research, and his men kept delaying and extending.

Wu Tong continued to refine the elements of the variable cycle engine, recording the key points on the draft paper.It is a multi-design point engine that adjusts its thermodynamic cycle parameters by changing the geometry, size or position of some components.

Such as boost ratio, turbine inlet temperature, air flow and bypass ratio, change the engine cycle working mode, high thrust or low fuel consumption so that the engine can work in the best condition under various flight conditions.

At the same time, the variable cycle engine can work in multiple modes, including turbine mode, turbofan mode and ramjet mode, so it has good performance in subsonic, transonic, supersonic and hypersonic flight conditions.

Wu Tong held the pen and began to calculate based on the quasi-perfect aerodynamic layout parameters he had just derived.

Based on the thrust required by the engine and the dynamic parameters of super maneuverable lift-off, and using the elements of the variable cycle engine as the concept, Wu Tong began to establish two sets of three-dimensional perspective model diagrams in the derivation space. .One group is the existing WS-15S, and the other group is just a rough outline and a very vague simple diagram of the parameter model.

"Okay!" Lu Xiao's voice was soft and steady. Although he did not capture the moment when Wu Tong's inspiration was born, he was familiar with Wu Tong's wholehearted research state. This was not the first time he had seen Wu Tong's state. .Every time, it represents the birth of a miracle!Joy emerged in his heart, and he was looking forward to Wu Tong's breakthrough!
(End of this chapter)