This project belongs to the field of energy and power engineering. According to the actual operating requirements of gas turbines, it adopts the multi-field coupling principle and has formed a number of independent intellectual property rights for key technologies of the air intake system and equipment of heavy-duty gas turbine generator units.
According to the "Energy Technology Revolution and Innovation Action Plan (2016-2030)" and the "Energy Technology Revolution Key Innovation Action Roadmap" promulgated by the state, it is further clarified that gas turbines are high-end products in my country's energy equipment manufacturing industry, and its core technology is urgently needed. However, for heavy-duty gas turbine generator sets, the country still relies on imports. Focusing on the air intake system and equipment of heavy-duty gas turbine generator units, this project has developed a composite muffler for the air intake system, a reinforced and shock-absorbing structure and internal design and manufacturing standards with independent intellectual property rights, which provides the basis for the independent design and manufacturing of the air intake system and equipment of heavy-duty gas turbine turbines.
Key technologies and innovation points:
(1) For the first time, a set of internal design and manufacturing standards with core technologies of the enterprise has been formulated: "Design and Manufacturing Standards for Air Intake Systems of Heavy Gas Turbine Generator Units-2011 Edition".
In view of the outstanding problems existing in the air intake system of heavy-duty gas turbine generator units, there is a lack of independent design, processing and manufacturing capabilities. Based on internationally accepted standards such as ASME, ASTM and EJMA, and combined with the operating characteristics of heavy-duty gas turbine generator sets, this project establishes physical equations, compatibility equations and balance equations for each structural section of the air intake system, and adopts collaborative design methods to formulate a complete set of internal design and manufacturing standards "Design and Manufacturing Standards for Air Intake Systems of Heavy Duty Gas Turbine Generator Units-2011 Edition", forming the company's independent design and manufacturing capabilities.
(2) Innovatively developed a multi-effect staggered heavy-duty gas turbine generator unit air intake reinforcement and damping structure.
The air intake system of heavy gas turbines has problems such as large volume, complex structure, large vibration and weak strength. This project uses the Holz method and vibration mode superposition theory to solve the natural frequency, vibration mode and dynamic response of the air intake system. Under the conditions of meeting Lyapunov stability requirements, a thermal expansion model of the air intake system is established., axial and radial force models and dynamic models of the internal flowing medium, etc., grasp the thermal expansion rates in each temperature section of the system, the velocity field, temperature field and stress field distribution of the internal medium. A multi-effect staggered system reinforcement and damping structure has been developed (authorized invention patent: ZL201010201014.1 Gas turbine intake elbow reinforcement and damping structure), which effectively solves the unstable operation of the air intake system and problems such as structural strength weakening caused by system vibration.
(3) It was the first to develop a composite locking muffler for the air intake system of a heavy-duty gas turbine generator set.
Aiming at the noise problem caused by the operation of the air intake system of heavy gas turbine generator units, the structural optimization design of the system muffler is carried out by using the staggered grid difference algorithm and power spectrum analysis method based on TRIZ theory, and a compound locking muffler for the intake system is developed.(Authorized invention patent: ZL201010201028.3 Gas turbine inlet compound locking muffler) In the actual operation of the unit, the system operating noise is less than 60db, which meets the requirements of relevant environmental noise standards and effectively solves the problem of high system noise, unstable air flow at corners and other problems.
This project has been authorized for 5 invention patents, applied for 5 invention patents, and published more than 20 academic papers (9 included in SCI /EI). The research results have been promoted and applied in the power industry. From 2013 to 2015, the new output value was 270.82 million yuan. The new profit was 28.42 million yuan, creating good economic and social benefits. It has reached the domestic advanced level after being reviewed and approved by the project acceptance expert group.