It's a long story Only a simple description and professional explanation can be made here. You should go to an academician and doctoral supervisor of China Academy of Aeronautics and Astronautics, and consult the researchers of the Institute of Mechanics of Chinese Academy of Sciences who are engaged in the study of explosion dynamics.
There is a word limit for posting here. It used to be 9999 words at most, but now I don't know. I have other things to go out, so I can't give you a long speech, even though I type on the keyboard at a moderate speed.
What you notice mainly refers to the blooming form of fireworks.
When the fireworks bloom, you can see the pattern only because there are bright beads in the paper shell of the fireworks. After being ignited, the bright beads burning on the surface are pushed out of the paper shell by the thrust of explosion during the bud opening process, and the bright beads are gradually burning in the air movement.
After that, it shows the trajectory of its movement in its disappearance, and with the help of the persistence effect of human vision and the extended exposure mode of photography, it produces the pattern effect.
If many bright beads in a paper tube are filled into the paper tube in series and mixed with gunpowder injected into the paper tube, the bright beads will be pushed out continuously during the combustion process, forming clusters of discontinuous, discrete, divergent and family curves.
If it is a "fireworks bomb", there is a brief introduction at the end of this article. The standard pattern it produces is spherical, which is a nearly circular diffusion pattern under the influence of gravity and airflow. If it is in a weightless environment, it is ideal isotropic symmetry.
Hedgehog is a standard circular pattern, just like sea urchin and table tennis.
In the "Fireworks Bomb", there can be "bright beads" with different diameters, different burning speeds, different compositions and different flame color effects, and the patterns are rich when they bloom. Many small paper tubes can also be filled with gunpowder and put into the "Fireworks Bomb". The following also introduces artificial manufacturing.
Yes, the "bright beads" of fireworks display have different patterns in spatial distribution and density, which is the "different" phenomenon you proposed.
If we carefully observe the video and photos of the non-circular pattern blooming in the fireworks, we can notice that the bunching direction of its blooming is uncertain, both at home and abroad. This is a world problem.
In 60,000 Chinese-English bilingual guided fireworks engineering technical documents, I gave a comprehensive explanation of the new blooming mode in the air and the blooming mode of space posture. In order to avoid * * *, I will not disclose the specific contents of the document for * * *.
If you need to know for yourself, you must study mechanics at university. By the time you graduate from college, you will be able to get a general idea of something. In addition, we should study aircraft dynamics, aircraft measurement and control and navigation, and inertia mechanics.
Major. But these methods are standard, and the cost is quite high, so they can't be used in practice. If we want to reduce the cost, we must rely on the accumulation of precision machinery manufacturing.
As for the large number of patents applied by fireworks manufacturers in China and China around 2000, they all violated the dynamic standards such as "counterweight" and "pouring iron sand".
Your problem is an essential defect that Europe, America and Japan can't solve. I have no culture, so I can't answer directly.
There are many college students, master students, doctoral students and postdoctoral students who have studied the above professional courses. China has a population of over 50 million. Why is there no movement?