An integrated approach to fuel-flexible injector design

麦吉尔大学、多伦多大学和劳斯莱斯加拿大公司(RRC)拟议的CRD项目是用于发电的燃料柔性超低排放燃气轮机(GTE)战略研究计划的主要新元素。这些发动机通常燃烧天然气，但客户对可再生替代燃料的可操作性的需求正在增加，它们代表着发电市场的一个巨大且不断增长的部分。目前的超低排放燃烧室设计(如干式低排放(DLE)燃烧室)一般不允许广泛的燃料灵活性，这主要是因为对非传统燃料成分对发动机相关燃烧现象的影响认识不足，如回火、喷出和排放。这既表现为燃料柔性燃烧室的启发式设计的困难，也表现为模拟燃烧室行为的数值技术的不准确/不可靠。湍流反应流的计算流体动力学(CFD)模拟。项目合作伙伴共同制定了一项广泛的研究和开发计划，概述了改进燃料柔性DLE燃烧器设计所需的必要关键进展。这项拟议的研究从实验上研究了许多这些关键现象，使用了从基本仪器到与发动机相关的几何形状的实验室实验，并通过计算使用最先进的湍流燃烧模型方法来改进RRC可用的设计工具。这些改进的工具将使RRC能够设计出排放更少、性能更高的下一代燃料柔性燃烧器。

The proposed CRD project between McGill University, the University of Toronto, and Rolls Royce Canada (RRC) represents a major new element in a strategic research program on fuel-flexible ultra-low-emission gas-turbine engines (GTE) for power generation applications. These engines, which typically burn natural gas but are experiencing increased customer demand for operability with renewable alternative fuels, represent a large and growing sector of the power-generation market. Current designs for ultra-low-emission combustors (e.g. Dry Low Emission (DLE) combustors) do not generally allow for broad fuel-flexibility, largely due to insufficient understanding regarding the effects of unconventional fuel compositions on engine-relevant combustion phenomena, such as flashback, blow-off, and emissions. This manifests both as difficulties in heuristically designing fuel-flexible combustors and inaccuracy/unreliability in numerical techniques for simulating the combustor behavior, viz. computational fluid dynamic (CFD) simulations of turbulent reacting flows. The project partners have collaboratively developed an extensive research and development plan that outlines the necessary critical advancements needed to improve the design of fuel-flexible DLE combustors. The proposed research investigates many of these critical phenomena both experimentally, using laboratory experiments ranging from a fundamental apparatus to an engine-relevant geometry, and computationally, using state-of-the-art turbulent combustion modelling approaches, to improve the design tools available to RRC. These improved tools will enable RRC to design next-generation fuel-flexible combustors with reduced emissions and higher performance.