The larger the intake distortion, the more the surge boundary shifts to the right, and the lower the surge margin. For this reason, in the design of the intake passage adjustment, the requirement of the first swash plate angle is increased with the increase of the angle of attack compensation. The intake port surges at a high angle of attack. For example, by analyzing the graph, it can be basically determined that the intake port and the engine can be stabilized when the engine is in a stable working state below the angle of attack, and there is considerable margin. However, when the engine is in a transient working state such as acceleration and deceleration, and the switch is energized, the engine surge margin will be greatly reduced. Under high altitude and low Reynolds number conditions, the engine's surge margin and resistance to inlet distortion will be reduced. In addition, when the low-pressure compressor is combined with the high-pressure compressor, when the compressor is loaded into the engine to form the whole machine, the interference between the components also reduces the surge margin of the low-pressure compressor, that is, the whole engine The surge margin will be lower than the surge margin of the compressor components. For the above reasons, the previous tests and compatibility assessments were insufficient, and it was not confirmed that the inlet engine compatibility met the requirements under the entire flight conditions. To this end, on the high-altitude platform, a simulation test for the distortion of the engine-based high-altitude platform simulation plate was carried out. The simulation board technology of China Southern Airlines is used to simulate the stable dynamic combination distortion of the total pressure field at the inlet of the inlet. The development of an analog plate of a certain port inlet distortion simulator is to carry out the simulation test of the engine high-altitude distortion. Firstly, the problem of the distortion field simulator should be solved.
We can produce the Boiler Pipe accordng to the EN10216 standard, such as the 10CrMo5-5 steel pipe, 10CrMo9-10 steel pipe, 13CrMo4-5 steel pipe, 15NiCuMoNb5-6-4 steel pipe, X10CrMoVNb9-1
steel pipe and X10CrWMoVNb9-2 steel pipe. Yangzhou Chengde have been sold about 700000 MT boiler pipe to the world in recent 10 years and we share the 70% of export boiler pipe in china.
At Chengde, we take quality seriously. This
philosophy carries through every aspect of our operation. That is why we
maintain a fully documented/fully certified Quality Management System which
complies with the requirements of ISO 9001. This quality system encompasses
every phase of our business. Chengde has established its complete quality
system as per ISO 9001 since 2006 and upgrade to ISO9001 :2008 at a later
stage.
Boiler Tube,En10216 Boiler Pipe,10Crmo5 5 Pipe,15Nicumonb5 6 4 Pipe YANGZHOU CHENGDE STEEL PIPE CO.,LTD , https://www.chengdepipe.com
In the year of 2015, we win the first prize of National Science and Technology Progress Award by the program of [The innovative research & development, and application of steel pipes used in 600 ℃ Ultra-super critical coal power generation unit".