Wealth

Ah evildoer, evildoer! Everyone tried to find the answer on Chief Zhang's face, but found that he was also embarrassed.

Fan Wubing smiled and said to everyone, "It’s not my fault that I’m young, but if I can’t make a difference in science because I’m young, that’s a lie! I will introduce myself again solemnly. My name is Fan Wubing is a model fan. He is not sick, that is, there is no problem! A person who has no problems is almost a saint!"

　　 Hearing Fan Wubing's entanglement, the people sitting below laughed. Unexpectedly, this kid is still very interesting. It's just a high-end weapon like Blizzard. Why shouldn't a kid get it out? If three-year-olds can make this, then how should we old guys who have studied cutting-edge weapons for a lifetime behave?

Director Zhang introduced to Fan Wubing, "This is Lao Sun, an expert in fluid mechanics, Lao Bo, an expert in aerodynamics, and Lao Wang, a rocket expert. Time is limited, and there are many other differences. introduced."

　　 "Long admiring your names, it's so thunderous." Fan Wubing said sincerely.

　　 This is not his pretentious posture, but the names of these people. In later generations, he sounds like all of them are golden, and he never thought of killing him. He would actually answer these people's questions.

The fluid mechanics expert Sun Lao frowned and looked at the grinning Fan Wuyi, and asked Director Zhang dumbfoundedly, "Xiao Zhang, are you sure that this three-year-old is the designer of Blizzard? Don't you bluff me, you have to know My heart is not very good either!"

　　 Director Zhang nodded, speechless.

　　Fan corrected the disease solemnly, "First of all, I declare that I am no longer a three-year-old child, I am three and a half years old."

Old Sun curled his lips and said, "You kid doesn't speak authentically and runs the train with your mouth full! Our names have never appeared in public newspapers and magazines. How could you have heard of our names? You are not an honest child. !"

　　 Everyone nodded in agreement. It was not that they bullied the child, but wanted to see if the child in front of him really had the ability to design a blizzard. This is the most important point.

"Lao Sun is true—you take it seriously—" Fan Wubing said with a smile, "But to be honest, although I have never seen you, or even heard of your names, in my heart, I have been with you for a long time!"

　　 Seeing the crowds looking thoughtful or unbelieving, Fan Wubing continued, "We are both national science and technology people, why do we need to follow the rules? If we are not full of blood for the country, how can we get back together?"

　　 "Well said, I kind of believe you are the designer of Blizzard now." Lao Sun looked at Fan Wuyao with surprise and applauded.

　　 "Since everyone has reached a preliminary consensus, can we start?" Director Zhang heard the opportunity.

Everyone nodded. Fan Wubing saw that everyone was embarrassed to ask questions first, so he took the initiative to say, "Anyway, no matter which senior asks questions, it is for me to explain. It is better for me to explain the principle of cavitation weapons. Go ahead."

　　 Several leading experts nodded in agreement, so Fan Wuyao sorted out his thoughts and started his first public speech in his life.

　　 "If you want to talk about the snowstorm torpedo, you have to mention the supercavitation phenomenon." Fan Wuyao said to everyone.

　　 When the liquid moves around the object quickly, the pressure will drop, and as the speed increases, when the liquid pressure is equal to the water vapor pressure, the liquid changes from the water phase to the gas phase, forming water vapor. Cavitation will distort the water flow, thereby losing the efficiency of water pumps, turbine hydrofoils, and propellers. It may also cause strong shock waves and cause corrosion of metal surfaces. Ship designers often have to deal with troublesome cavitation, trying to avoid cavitation, such as designing the hull into a streamlined shape.

　　 But the trouble caused by this kind of cavitation has played an important role in overcoming the viscous resistance caused by friction with water.

"Due to the viscous resistance between the water and the moving objects in the water, the resistance of the object in the water is about a thousand times that of the air resistance." Fan Wuyi said, "but we can use the nasty cavitation in the water. A renewable gas envelope is formed around the lower object, which minimizes the wetted area of ​​the fluid on the surface of the object, thereby greatly reducing the viscous resistance. This low-density bubble is a supercavity. The length of the bubble is related to the movement speed of the object. , The object can move fast with minimal resistance inside the long bubbles that it produces. This is the design principle of the snowstorm torpedo."

　　 Sun Lao asked, "The phenomenon of cavitation is easy to demonstrate, but how feasible is it to make supercavitation by yourself? The speed of torpedoes in the water changes. At what initial velocity can the ideal supercavitation be obtained?"

　　 "This question depends on my blizzard design drawing." Fan Wubing pointed to the blizzard design sketch hung on the wall and talked freely. uukanshu.com "The snowstorm torpedo uses a rocket engine to generate a large number of bubble holes in the torpedo head, so that the torpedo is completely surrounded by the hole, and the water resistance is greatly reduced, so as to achieve a very high speed. In other words, the mine body is not In direct contact with water, the resistance of natural water is very small. The obstacles to torpedo navigation at high speed are thus cleverly resolved. And his initial speed should be more than one hundred knots! The most critical problem is mainly caused The component cavitation generator of the super-cavitation phenomenon. However, where to produce bubbles of density, scale, and pressure, this is the problem that the predecessors present here need to solve."

　　 "How is the initial velocity data obtained? Is there any theoretical basis?" someone asked.

Fan Wubing shrugged his shoulders and replied, "If we need to find a theoretical basis for everything, I am afraid that we are still living in primitive society. I can only guarantee that when you seniors are experimenting, if you refer to the data I provided, It won't be wasted."

Next, Fan Wubing continued to answer questions from everyone about the design of the snowstorm torpedo, such as why there are eight small rocket engine nozzles around the main rocket engine on the central axis of the torpedo’s rear center axis, and the side of the torpedo shell protrudes. What is the role of the eight folding brake arms, and how to ensure that the high-speed snowstorm torpedo can move in the water and so on.

　　 After a commentary, everyone was suddenly enlightened, but Fan Wuyi was a little bit unable to support it. God knows where these old experts come from so many questions, it is almost 100,000 asking what!

　　 Anyway, this matter can be dealt with. Whether the blizzard can make it out depends on the abilities of their old experts.

　　 Fan disease-free individuals are still very confident in them.