There are two most important commissioning items for these ongoing verification commissioning, that is, water swallowing commissioning.


    Water swallowing test run, as the name suggests, is to let the engine suck in a large amount of sand or water and other sundries during the operation of the engine, so as to develop the performance of the engine. Under such extreme conditions, the developed engine can withstand the test, whether it can operate stably, whether it will stop, etc.


    At this time, on the No. 2 test bench, an engine has long been firmly fixed by the staff, and the engine has already been started.


    In the control room of No. 2 test bench, Professor Dai and others were also staring at the data on the transparent screen in the control room.


    Although the water swallowing verification has not started yet, the atmosphere in the control room is a little serious.


    After all, the development and test run of swallowing water is a huge test for any engine.


    Seeing that the engine has entered the cruise speed state, Professor poke said to the controller, "it is possible to verify the swallowing of water!"


    "Yes!" the controller replied, and he immediately pressed the button to swallow water.


    Then Professor Zhang and others, through the huge transparent screen in the control room, can clearly see that at the air inlet of the engine, a certain water curtain begins to form, and countless water droplets are sucked into the air inlet under the strong suction of the air inlet.


    After all, the engine speed has entered the rated speed, and the combustion chamber temperature inside the engine has reached as high as thousands of degrees. Although these water will not have a great impact on the engine blades like ice, if a large amount of water enters, However, it can reduce the temperature of combustion chamber and turbine, which affects the efficiency of engine.


    However, the worry of Professor Zhang and others seems superfluous. Although it is said that many water droplets have been sucked into the engine at this time, it does not reduce the power of the engine. At the same time, according to the national data, the temperature inside the engine has not decreased, but the temperature inside the engine has increased slightly.


    Professor Zhang knows that this is because the temperature and pressure inside the engine are too high, which leads to the rapid decomposition of these water vapor into hydrogen and oxygen under extreme high temperature and high pressure environment, and then rapid combustion again becomes the reason for water. The flame sprayed from the tail of the engine is no longer pure orange, But orange with a trace of blue, you can see.


    "Increase the amount of water you swallow!" just then, Professor poke continued.


    "Yes!" with Professor Zhang''s order, the controller gradually increased the flow of jet water.


    With the increase of water intake, the water sucked into the engine inlet naturally increases, and the original orange flame also begins to turn into light blue. Fortunately, there is no qualitative change in the internal temperature of the engine at this time, but it has returned to the original temperature.


    However, there was no change on the professor''s face, but continued to order the controller to increase the water swallowing until the output power of the engine and the temperature inside the engine changed.


    Until this time, Professor Zhang ordered to stop the test run. Obviously, the water swallowing verification test run has been completed, and the next test is the test of ice swallowing and sand swallowing.


    Of course, the engine used in the ice swallowing and sand swallowing verification test run will no longer be the engine that has just carried out the water swallowing verification test run before.


    In fact, in order to improve the efficiency of test run and get enough accurate data, there will be only one test run project for each engine. For the previous water swallowing test run project, this developed engine will be sent to the assembly workshop for disassembly and analysis immediately after verification.


    The subsequent ice swallowing verification test run will be filled by other engines for further verification.


    Therefore, the engine that had just been verified and tested by swallowing water was soon removed from the test bench by those employees of the laboratory, and another engine was reinstalled on the test bench to continue the test.


    If the water swallowing test run is to test the operation of the engine in heavy fog or heavy rain, the ice swallowing and sand swallowing are to simulate the operation of the engine in ice, snow and even desert.


    After the new engine was replaced, Professor poke immediately gave the order to start the engine, and at this time, their faces became more serious. After all, compared with the water swallowing test, ice swallowing and sand swallowing verification test, the test of the engine will be greater, and even the ultimate test of the engine performance.


    After all, when the engine is running at a high speed, it sucks ice and sand, which is a limit test for the engine inlet blades and other blades, including turbine blades. After all, under such high-speed rotation of the engine, if a slightly larger ice or sand enters the inlet and hits the blades, it will cause damage to the blades, It is possible to destroy the engine directly.


    Then, Professor Zhang gave the big start command, and the controller naturally listened to the old command and opened the simulation button.


    As a result, a lot of tiny ice and snowflakes appear at the air inlet of the engine, and as time goes on, these ice chips become more and more, and the volume becomes larger and larger. There were even ice chips the size of someone''s little finger.


    These ice chips appear near the engine inlet. Naturally, a large number of ice chips are sucked into the inlet. Professor poke and others heard the sound produced when these ice chips with large diameter hit the inside of the inlet.


    Although Professor Cha and others are very nervous about such verification and assessment, after all, the test run is too rough. If it is an official laboratory, it is absolutely impossible to carry out the test run assessment in this way. You know, he and these experts present are very clear that most of the ice chips for test run are ice chips with small volume and diameter.


    But among these ice chips, there are ice pieces with a diameter of about one centimeter! If it is an official test run, it is absolutely impossible, because everyone knows what such ice means to the engine.


    Of course, as the person in charge of this verification test run, Professor Zhang is also very disapproval of such a rough verification test run. He believes that the test run of Tiangong technology should be the same as that of the official laboratory, as long as the official verification test run data can be reached.


    But anyway, although he said he was the person in charge of the air launch project, as a private enterprise, the final decision was still in Wang Bin''s hands. Because Wang Bin insisted on such verification and test run, he had no good way.


    ......