Modeling Of Gas Turbine Inlet Guide Vane System And Preliminary Design Of Its Test Rig

Gas turbine is a power engine blending with various domain knowledge,which is operated based on the coordination of a large amount of complex institutions.The main components of gas turbine are compressor,combustion chamber and turbine.There is a stage of stationary vane before the first level of the compressor blade,which is called inlet guide vane(referred to as IGV).The angle of these guide vanes can be adjusted,so it’s also known as variable inlet guide vane(VIGV).IGV system plays a vital role in the process of operation of the gas turbine.Current research about IGV system mainly focus on the aerodynamic performance of the vanes in it.There is relatively few research for the whole IGV system structure or its driver and control system.At the same time,the lack of related simulation software about IGV system leads to the engineer has many inconvenience in the design of IGV system,and are likely to cause selection problems such as excessive design.A marine gas turbine IGV system was once controlled by pneumatic system,now it needs to be updated into hydraulic system,based on this backgroud,this paper has carried out the following aspects of work: a)For IGV system,build the IGV system simulation model with the aid ofSimscape toolbox.This simulation model is composed of machinery,driver,and control three parts respectively.In the process of building thesimulation model,the characteristics of the model is fully embodied,whichare modular,parametric and visualization;b)The model is used to optimize the PID control logic,which is widely usedn the current IGV system.The preliminary apply of this simulation modelshows that the model has certain feasibility and can well realize various offunctions such as the IGV system design,type selection,control logicoptimization.c)In order to obtain more accurate model parameters,the IGV system test rigneeds to be built.This test rig will also be used to realize the hardware-in-the-loop simulation test.The preliminary design of the test rig is conductedin this paper.Related equipment parameters are calculated according to thespecific conditions of a type gas turbine.Electro-hydraulic servo loadingsystem is adopted to realize the simulation of vane’s torque in the test rigthat is caused by its aerodynamic force load.The controller of the loadingsystem is also designed based on the specific equipment parameters.Simulation about loading system is conducted combining with IGV systemto get the loading effect of the IGV system test rig,the result shows thatthis design is completely feasible,and has laid a solid foundation for thesubsequent test rig’ performance.