Multi-Physics Modeling of Jet Engine Clearance Sensor - Phase II

在喷气发动机设计中，叶尖与发动机壳体之间的间隙是影响发动机性能的重要因素。由于极端的温度变化和高离心力和扭转力，该间隙可能会发生变化。GE航空已经开发了一种传感器来监测机翼间隙。该传感器安装在发动机外壳中，并基于在叶片经过探头时感测电容变化。探头耦合到一个基于谐振腔和谐振器的电子设备上，产生一个输出信号。间隙的精确测量需要传感器的建模和校准。GEAviation将与Dr. G.E.马尼托巴大学的Bridges开发了一个多物理模型，用于确定间隙探针测量的电容变化，并使用该模型校准传感器输出信号。在第一阶段，开发了不同几何形状和材料的探针尖端刀片模型。在第二阶段，将对耦合腔和电子器件进行建模。该模型将基于电磁仿真。实验验证将使用GE航空制造的台式旋转台系统进行，用于测试其间隙传感器。一名来自马尼托巴大学的博士生将开发和验证校准模型。除了提供间隙传感器的详细信息，GE航空还将提供一个台式旋转钻机系统，并帮助获得测量结果。GE航空是世界顶级的飞机发动机供应商之一，为军用和商用飞机提供发动机。该项目中开发的校准模型将为GE航空的间隙探针的准确使用提供重要的组成部分，随后有助于改进其喷气发动机的设计和性能。

In jet engine design knowledge of the clearance between an airfoil blade tip and engine housing is an importantfactor that can dramatically affect engine performance. This gap can change due to extreme temperaturevariations and high centrifugal and torsional forces. GE Aviation has developed a sensor to monitor airfoilclearance. The sensor is mounted in the engine housing and is based on sensing the capacitance change as theblade passes over a probe. The probe is coupled to a cavity and resonator based electronics, which produces anoutput signal. Accurate measurement of the clearance requires modeling and calibration of the sensor. GEAviation will be partnering with Dr. G.E. Bridges at the University of Manitoba to develop a multi-physicsmodel for determining the capacitance change measured by the clearance probe and use this to calibrate thesensor output signal. In Phase I a model of the probe tip-blade for different geometries and materials wasdeveloped. In Phase II, the coupled cavity and electronics will be modeled. The model will be based onelectromagnetic simulation. Experimental verification will be performed using a bench-top spin-rig system,built by GE Aviation for testing their clearance sensor. A PhD student from the University of Manitoba withexpertise in computational electromagnetics will develop and verify the calibration model. In addition toproviding details of the clearance sensor, GE Aviation will provide a bench-top spin-rig system and aid inobtaining measured results. GE Aviation is one of the worlds top suppliers of aircraft engines and offersengines for military and commercial aircraft. The calibration model developed in this project will provide animportant component for the accurate use of GE Aviation's clearance probe, subsequently aiding in improveddesign and performance of their jet engines.