"Yes, if this thing is used on a rocket, it can increase the gas heat flow to seven to eight times the speed of sound, which will generate huge thrust."
"This is the Laval nozzle, which actually plays a role as a 'flow rate increaser'. Not only the rocket engine, but the missile nozzle is also in this horn shape, so the Laval nozzle has a very wide application in weapons."
"Is this related to Xiaomiao's research?" Zhou Zhi asked modestly.
"Fluids have commonalities." Qin Haifeng smiled and said, "Although our model is mainly used to simulate water flow, which is used to simulate the vacuoles generated by the low pressure caused by the Venturi effect when the fluid moves at part of the high-speed. It simulates the movement trajectory of these vacuoles and their effect on the metal surface. It belongs to the application category of overcoming damage, but if the parameters are slightly changed, it can also be applied in the direction of obtaining gain."
"Xichang Base was inevitably jealous when we saw that we used the model well. I just heard that you were going to launch satellites first, and thought that several parties could cooperate, so this meeting called us too."
"But this is the research institute of the Ninth Academy?" Zhou Zhi was still a little confused: "The Ninth Academy has no research missions related to rocket satellites, right?" "Actually, we have been doing computer particle motion simulations." Sun Liangdong said: "But due to the limitations of resources and previous academic routes, we have always followed the path of linear computing."
"I heard that you have made considerable breakthroughs in nonlinear simulation and have been reliable in the Institute of Shipping. I would like to ask you to teach us a class." Sun Liangdong said: "As for whether the Ninth Academy has anything to do with rocket satellites, can our products still leave the rocket carrier? We are all a family connected by muscles!"
This is right, how can two bombs and one satellite be used to drive it? They are really a family. "Grandpa Sun, don't worry, grandpa has already explained to me. I have made the latest progress in our computing power matrix principle and nonlinear basic model into reporting materials. As for the research on high-speed fluid cavitation simulation, it may be a problem for Brother Gu, Brother Yao, Sister Zhang and others."
"Xiaomiao is talking about several comrades from our project team in Shudu." Qin Haifeng quickly explained: "Four-leaf clover provides us with a black box of computing power. The comrades of the fluid cavitation modeler did an expansion study based on the nonlinear model of Xiaomiao."
"Xiaomiao is doing basic research, and there is no problem in guiding us from a mathematical perspective, but it is a bit far from these specific applications. We need to do high-speed gas propulsion and particle impact simulation of rockets. It requires several comrades to participate. "
" Seeing the vitality and motivation of your young people, I reminded me of the momentum in the desert back then." Sun Liangdong smiled and said, "The country has talents, and each has led the way for hundreds of years. The future academic studies and academics must rely on you!"
The dinner at the guesthouse is quite sumptuous. The masters here can make Shandong cuisine. Sun Liangdong is in full swing as a landlord and invites Mai Xiaomiao and Zhou Zhi to have a meal.
Although there is no sea cucumber with scallions, a dish of beef with scallions is rich and tender, which makes Zhou Zhi applaud.
After dinner, they arranged a rest. Zhou Zhi and Mai Xiaomiao's room were adjacent to each other. After putting things on, they stuck together again and walked downstairs for a walk.
The institute also has basketball courts, badminton courts, single and double bars and other exercise facilities. They are surrounded by a small stadium, and there is nothing good to look at. The two of them simply circle around the big wall.
"I didn't know that you worked so hard during this period." Zhou Zhi quietly pulled Mai Xiaomiao's hand: "There are extra tasks in the future. Tell me and I'll adjust the project progress."
"I'm not tired." Mai Xiaomiao smiled and said, "You just made me feel too relaxed. I'm a little unaccustomed. I didn't tell you after receiving the task given by Uncle Qin."
"It's all a big deal..." Zhou Zhi rubbed Mai Xiaomiao's palms: "Since you have already taken it, then complete it well, but if you feel pressure, you must say it. I'll go to them to coordinate."
"Well," Mai Xiaomiao also pinched Zhou Zhi's hand: "Are you angry?" "You're angry, it's very serious." Zhou Zhi pretended to be calm in the dark: "I must let me know about increasing the workload in the future."
"Okay." Mai Xiaomiao secretly kissed Zhou Zhi in the dark: "This is considered an apology."
"If you apologize, you can't be so perfunctory..." Zhou Zhi hugged Mai Xiaomiao and let her go for a while: "You have to be sincere."
"Well... elbow, you bad guy, carry me back!" Mai Xiaomiao was made weak by Zhou Zhi.
"Look at how sincere I am..." Zhou Zhi was still smiling, and then he was punched by Mai Xiaomiao.
Although Zhou Zhi felt sorry for Mai Xiaomiao, he was actually very proud of her. After the basic nonlinear simulation model was successfully polished, he could build high-end simulation applications based on it.
This is as important as the improvement brought by a country to aircraft manufacturing after it has a giant wind tunnel. With a nonlinear model, many physical phenomena with nonlinear properties can be simulated.
For example, the design of a rocket nozzle involves parameters such as flow rate, flow rate, temperature, and nozzle design and dynamic adjustment system design. If all experimental designs are adopted, the material burned out of light will be an unbearable astronomical figure.
With computer simulation, it is amazing. It not only saves funds, but also saves a lot of time. Preparing for experiments on computers is to type in keyboard parameters and design models, which is much more efficient than calling materials to accumulate experiments.
Moreover, once the model is built, it can be used repeatedly. For example, the fluid model developed by the Ship Design Institute now adjusts the correlation coefficients such as fluid density, damping, and temperature, and can convert the liquid properties to gas properties. Adjust the flow velocity and flow environmental structure to convert the overcome water flow resistance into the generation of air flow thrust.
As for the example mentioned by Sun Liangdong, it is even more exaggerated. When talking about this in the research institute belonging to the Ninth Institute, it is difficult not to remind people of nuclear fusion and nuclear fission.
The most new ⊥小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小
Chamber at the dining table today, Zhou Zhi learned that the US Ministry of Energy had used $1.2 billion to build a "national ignition device" that generates 18 megajoules of pulse energy with 192 high-power lasers to conduct research on the physical laws of nuclear reactions.
Today, the United States, Russia, Britain, France, China and Japan have the ability to use computers to simulate nuclear tests, but all countries use "linear + supercomputer" without exception, that is, use supercomputers with very crazy operations to simulate nonlinear nuclear reaction laws using linear programs.
To put it bluntly, it is the heap device and the heap performance.
Using linear models to solve nonlinear problems is equivalent to using simple mathematical tools to solve high-end mathematical problems, which is equivalent to the ancients using calculation chips to solve the problem of arbitrary roots, and the calculation amount is very terrible.
The design idea of wheat seedlings is similar to that of primary school students doing Olympiad mathematics, and they take advantage of the advantages of their ideas.
It is better to use a simple foundation, without stacking massive operations, and through clever algorithm design, complex problems can be solved.
This is a qualitative leap and improvement. If you may have a "curve overtaking" if you are not careful, so although Zhou Zhi is afraid that the wheat seedlings will be tired, he dare not rudely stop her from being affected.
It's really a tangle...(This chapter ends)