Two-phase flow numerical simulation strategy in oil/air separators of P&WC engines

飞机发动机的设计和制造是加拿大航空航天领域的一个重要组成部分。这个市场竞争激烈。制造商必须依靠先进的研究来提出耐用性、易用性和效率方面的高质量产品。尤其是普惠加拿大公司的发动机，其设计寿命可达数万小时。该公司使用两相流混合物来润滑发动机的一些旋转部件。这些混合物需要在润滑回路中的某个点分离。目前，这种流动分离过程被安装在实际的发动机上，但需要更多的研究来更好地分离空气和油。为了满足上面确定的加拿大普惠公司的需求，我们建议确定哪种数值策略最适合于模拟P&WC发动机装置中的空气/油分离。这一过程的一个重要方面与模型及其预测的有效性有关。为此，该公司进行了内部实验测试并对其进行了监控。它们将与更规范的半理论解一起作为数值验证的参考。此外，该公司使用的数值商业工具需要进一步密切关系，申请人在整个职业生涯中通过其基础和应用研究项目致力于此。最终，来自研究的知识将使P&WC能够在单一的数值分析程序中统一润滑、混合和流动分离。

Aircraft engine design and built is a major component of the aerospace realm in Canada. This market is highlycompetitive. Manufacturers have to rely on advanced research to propose high quality products in terms ofdurability, ease of use and efficiency. In particular Pratt & Whitney Canada engines are designed for tens ofthousands of hours. The company uses two-phase flow mixtures to lubricate some rotating parts of the engines.These mixtures need to be separated at some point in the lubricating loop. Presently, this flow separationprocess is installed on actual engines but requires more research to better separate air from oil.To fulfill the needs of Pratt & Whitney Canada, identified above, we propose to determine which numericalstrategy is best fitted to model the air/oil separation in P&WC engine devices. An important aspect of thisprocess is linked to the validity of the models and their predictions. To this aim, in-house experimental testshave been performed and monitored by the company. They will serve as reference for the numerical validationtogether with more canonical semi-theoretical solutions. In addition, the numerical commercial tool used by thecompany needs further closing relations on which the applicant has worked on through its fundamental andapplied research projects throughout is career.Ultimately, the knowledge stemming from the research will allow P&WC to unify lubrication, mixing and flowseparation in a single numerical analysis procedure.