Abstract
This article describes the configuration and working principle of the high-temperature combustion system; according to the control requirements which have a wide range and high precision for fuel flow-rate of the high-temperature combustion system, a set of fuel supply system is designed based on the frequency conversion hydraulic technology and electro-hydraulic proportional technique. An automatic control system with the function of field and remote control is carried out to achieve the precise supply of the fuel. The transfer function which describes the dynamic characteristic of the fuel supply system is given and the dynamic matrix control algorithm is employed to realize the high-quality control of fuel flow-rate. The experimental results show that the response time of flow-rate is about 12 s, almost no overshoot, and control accuracy within 1%. Therefore, the designed fuel supply system can meet the requirements of the high-temperature combustion system, and the designed control system has good control performance.
Highlights
High-temperature combustion system (HTCS) is used to produce a gas flow field which has a characteristic of high speed and high temperature, and the heated situation of the specimen in the actual work situation can be simulated.[1]
In a practical work process, first, the mass flowrate of air is determined, and the gas temperature is controlled according to the fuel flow-rate, so the gas temperature of HTCS is mainly determined by the fuel flow-rate which is supplied to the combustor
The results show that the response time of the system is about 12 s and almost no overshoot, and control precision is within 1%
Summary
High-temperature combustion system (HTCS) is used to produce a gas flow field which has a characteristic of high speed and high temperature, and the heated situation of the specimen in the actual work situation can be simulated.[1]. Designing a wide range of fuel supply system and realizing the accurate control of the fuel flow-rate are the basic conditions that ensure the performance of the HTCS. A flow-rate control based on variable frequency technology for a high-temperature variable displacement pump was carried out by Xu et al.[10] To achieve the accurate closed-loop control of fuel flow-rate, a fuzzy PID algorithm was used by Zhang and Li,[11] but the authors did not consider the large inertia and pure lag caused by the gear flowmeter. The task of the fuel supply subsystem is to provide the required and cleanliness aviation kerosene for the gas generator of the HTCS; it is one of the most important subsystems of the HTCS, which directly affects the heating effect of high-temperature gas and the entire test. It is required to be as a relatively independent subsystem and can be integrated into the overall system
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