Development of computational tools for industrial combustion

随着欧洲和美国部分地区的趋势，预计加拿大将对用于运输和发电的空气污染物排放实施越来越严格的监管。不断上涨的油价进一步加速了对替代能源效率和低排放发电系统的寻找。尽管可再生能源对交通和发电都变得越来越重要，但在可预见的未来，这些部门将依赖大规模燃烧。因此，必须开发新的燃烧装置，能够使用不同的燃料(包括混合燃料)，保持最佳的运行条件，并最大限度地减少空气中的污染物，如氮氧化物(NOx)和烟尘。 将进行一系列数值研究，以预测燃烧不同燃料混合物的湍流火焰的行为。重点将是在计算中包括详细的化学成分，以及对湍流-燃烧相互作用进行更准确的建模。 我们建议在非预混和部分预混燃烧的背景下研究我们的新的湍流燃烧模型CMC的能力，以准确地再现着火、火焰稳定和污染物的形成，如NOx和碳烟。将测试LES和RANS解算器，并就计算成本和最终预测的准确性进行比较。数值结果将使用一组明确的实验数据进行评估，这些数据是关于激波管中的高压燃烧和表现出不同程度熄灭的升起和附加的喷射火焰。拟议的研究计划将侧重于准确预测点火延迟和位置、温度场、升起火焰的火焰位置、NOx和碳烟浓度。 拟议工作的结果将立即使汽车、航空和发电部门的工程师受益，因为它们将允许预测和调查新型燃烧设备中的火焰稳定性和空气污染物排放。

Increasingly stringent regulations on airborne pollutant emissions for transportation and power generation are expected in Canada following the trends in Europe and some parts of the United States. Rising oil prices have further accelerated the search for alternative fuel-efficient and low-emission power generation systems. Although renewable energy sources are becoming increasingly important for both transportation and power generation, these sectors will rely on large-scale combustion for the foreseeable future. Accordingly, novel combustion devices must be developed that can run on different fuels (including blended fuels), maintain optimal operating conditions and minimize airborne pollutants, such as nitrogen oxides (NOx) and soot. A series of numerical investigations will be conducted to predict the behaviour of turbulent flames burning different fuel blends. Emphasis will be on including detailed chemistry in the calculations, and more accurate modeling of turbulence-combustion interactions. It is proposed to investigate the capabilities of our novel turbulent combustion model, CMC, in the context of non-premixed and partially-premixed combustion to accurately reproduce ignition, flame stabilization and formation of pollutants, such as NOx and soot. LES and RANS solvers will be tested and compared with respect to computational cost and the accuracy of the final predictions. The numerical results will be evaluated using a set of well-defined experimental data for high-pressure combustion in a shock tube and lifted and attached jet flames exhibiting various levels of extinction The proposed research program will focus on the accurate prediction of ignition delay and location, temperature field, flame location for lifted flames, NOx and soot concentrations. The results of the proposed work will immediately benefit engineers in the automotive, aero, and power generation sectors, since they will allow the prediction and investigation of flame stability and airborne pollutant emissions in novel combustion devices.