"In other aspects, I don't see any major problems mentioned in the report, but there are some minor problems."
"We must also pay attention to these, and eliminate all problems on the ground!"
Zhang Xingyang read the last test report, which was the fifth experiment. In addition to mentioning the issue of engine synergy that everyone is currently paying more attention to, it mentioned.
In fact, some minor problems were mentioned, such as certain flow regulation problems in the storage tanks that provide liquid oxygen and kerosene to the 11 engines.
You must know that the flow problem of the engine almost directly determines the thrust problem of the rocket engine.
Of course, the flow adjustment problem is not a big problem, but when the engine is adjusted to the super-flow mode, the flow rate will be unstable.
This problem seems quite big. After all, if the flow rate is unstable, the thrust of the engine will not be stable either.
If the thrust is unstable and the attitude of the rocket cannot be adjusted in time, the rocket will easily deviate from its orbit.
Of course, this problem is actually quite small. After all, it is difficult for rockets to achieve such a traffic pattern when in use, and it is only possible when there is a nearly endless supply of traffic on the test bench.
And if you want to solve this problem, it is not difficult. You only need to add a flow limiting valve to the turbine pump responsible for pumping liquid fuel into the rocket engine combustion chamber to solve the instability in the super-flow mode. question.
"We have noticed all these small problems. Before this test, we had already improved almost all the problems found in the previous tests."
“Although there are still some areas that cannot be improved, they will definitely be resolved before finalization!”
What Geng Bo said is very confident, but the specific results of the treatment still depend on subsequent experiments.
"The sixth 1,210-ton propulsion system experiment will start in a little time. How long do you think it will take before it can be finalized?"
Zhang Xingyang did not continue to argue with Geng Bo about the previous tests, but instead talked about this test and subsequent finalization issues.
After all, if you want to test-fire a new recyclable rocket within 1997, the final plan for the propulsion system must be formally determined at least before June.
Otherwise, it will definitely delay the overall development progress of the rocket and cause difficulties in the development of the entire low-orbit satellite communication network.
After all, after the development of the propulsion system is completed, other systems need to be integrated and tested.
All of this will take quite some time, thanks to the fact that the entire rocket development system is now developed in parallel.
Propulsion systems, control systems, communications systems and structural design are all developed simultaneously.
However, the most difficult thing to develop here is the propulsion system. After all, the propulsion system solution adopted this time has almost never been developed by anyone in China before.
Various other systems, for example, are very similar to various rockets developed before, and everyone can learn from them.
It is not particularly difficult to develop. In fact, the most difficult aspects of the entire system are the appearance structure design and propulsion system design.
Because the shape adopts a two-stage rocket design, the structural requirements are more stringent, and the aerodynamic layout requirements are also higher.
However, the aerodynamic requirements of rockets are not as strict as missiles, and because of the use of a super-thrust propulsion system.
As the saying goes, powerful flying bricks, as long as the thrust is strong enough, even a brick can send you into space.
Therefore, the difficulty of appearance structure design is still slightly smaller than that of the propulsion system.
Therefore, the success or failure of the propulsion system almost determines the development progress of new recyclable rockets.
"The sixth test bed test of the 1,210-ton propulsion system begins!"
Geng Bo issued the instruction to start the experiment through the microphone on the console.
More than a dozen high-power turbine pumps are operating at full capacity, transporting tons of fuel and oxidizer into the combustion chambers of eleven rocket engines within one second, and then fully burning them.
Millions of liters of high-pressure gas are then sprayed to the ground along the tail nozzle of the engine in an instant.
Then these flame jets, which were enough to burn up a small lake, flowed around along the diversion trough, forming a series of fire dragon pillars.
This is the true miracle of modern industry and the crystallization of the wisdom of modern Chinese people.
Although there is a lot of Zhang Xingyang's own efforts here, it is even more the efforts of thousands of scientific researchers, engineers and workers.
After all, a person's power is always limited, and the collective power is infinite.
This propulsion system experiment is a long-term experiment, and the entire propulsion system will take more than a thousand seconds to work.
During this process, fuel tanks buried deep underground will continuously provide fuel and oxidizer.
Moreover, in fact, the test run time of more than one thousand seconds is basically a length of time that can be actually used.
You must know that the first stage use time of the Changsanyi rocket will not exceed 150 seconds.
The entire launch process, from rocket takeoff to star-rocket separation, will not exceed 1,500 seconds.
Therefore, the entire test run takes more than a thousand seconds, which means that if the launch is actually carried out, this flight time is enough to transport the satellite to orbit.
"Does the flow instability in super flow mode still occur?"
"How is the resonance state of the engine and the body under high power conditions?"
At the beginning of the engine test run, Geng Bo was busy monitoring various conditions of the engine, and also asked about some problems that occurred during the last propulsion system test and how they performed during this test.
"In super flow mode, after installing the speed limiting valve, the flow rate is stable."
"The resonance problem has been improved, but resonance still occurs during engine flow adjustment, but the impact is not significant."
The testers responsible for monitoring the operating status of the propulsion system quickly reported various statuses to Geng Bo.
"It seems that the results of the previous summary and problem solving are not bad. At least this experiment has improved a lot."
After listening to everyone's report, Geng Bo breathed a sigh of relief, turned around and said to Zhang Xingyang with a smile.
As the actual person in charge of the current propulsion system, Geng Bo still undertook a lot of pressure during these experiments.
The sixth test, judging from the current operating data, can almost be regarded as initially reaching the level of practical use.
It can be regarded as significant progress.
"It seems that after this test, the propulsion system can be initially finalized and can start comprehensive testing with other systems."
Zhang Xingyang retracted his gaze that had been staring at the electronic screen showing the propulsion system, smiled and said.
