New and Improved formulations of Pressure Sensitive Paints for Aerodynamics
用于空气动力学的压敏涂料的新配方和改进配方
基本信息
- 批准号:2481526
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:英国
- 项目类别:Studentship
- 财政年份:2020
- 资助国家:英国
- 起止时间:2020 至 无数据
- 项目状态:未结题
- 来源:
- 关键词:
项目摘要
Pressure-Sensitive Paint (PSP) is an aerodynamic investigation technique that allows for the measurement of pressure over an entire aerodynamic surface allowing for integration of loads over surfaces. In addition to this, the technique allows for pressure measurement in areas where traditional sensors cannot be located. When applied correctly to a surface, unsteady pressure measurements can be made allowing for investigations of phenomena such as buffet, cavity oscillations, and even transient aerodynamic flow. This added capability has represented a step change in the ability of engineers to investigate aerodynamic flows and vehicles. The PSP method relies on the luminescence quenching of oxygen to deactivate a photoactive molecule known as a luminophore. Luminophores currently under use have remained unchanged since the early 00s. The most common methodology of applying the luminophore to a surface involves the use of an oxygen permeable binder material. This binder material again has remained unchanged for almost 20 years. The only PSP formulation currently available from commercial suppliers are based on heavily fluorinated molecules (platinium pentafluoro-tetraphenyl porphyrin, Pt(TFPP) and fluorinated binding agents (polymers), are therefore extremely expensive and the oxygen quenching properties remain unoptimised.This project will investigate alternatives to the traditional PSP formulation (Pt(TFPP)) with the aim of developing new PSP formulations that are more sensitive, efficient and cheaper than current commercially available formulations. This will be achieved by synthesising a range of porphyrin luminophores that contain either a significantly reduced degree of fluorination, no fluorinated groups at all and that do not contain the heavy metal platinum. The triplet oxygen quenching properties of these new molecules will be determined by luminescence spectroscopy and the singlet oxygen quantum yields determined. The most promising candidates will then be taken forward for binder testing with a range of common polymers that possess a high oxygen permeability, and then the best performing combinations assessed for coating formulations and PSP performances in model wind tunnel conditions.
压敏漆(PSP)是一种空气动力学研究技术,可以测量整个空气动力学表面上的压力,从而可以集成表面上的载荷。除此之外,该技术还允许在传统传感器无法定位的区域进行压力测量。当正确地应用于表面时,可以进行非定常压力测量,从而允许研究诸如抖振、空腔振荡甚至瞬态空气动力流等现象。这种增加的能力代表了工程师研究空气动力学流动和飞行器能力的一个步骤。PSP方法依赖于氧的发光猝灭来使称为发光体的光活性分子失活。目前使用的发光体自20世纪初以来一直保持不变。将发光体施加到表面的最常见的方法包括使用透氧粘合剂材料。这种粘合剂材料几乎20年来一直保持不变。目前从商业供应商处获得的唯一PSP配方是基于高度氟化的分子(五氟-四苯基卟啉铂,Pt(TFPP))和氟化粘合剂本项目将研究传统PSP配方(Pt(TFPP))的替代品,目的是开发新的PSP配方,比目前市售的配方更有效且更便宜。这将通过合成一系列卟啉发光体来实现,所述卟啉发光体含有显著降低的荧光度、完全不含氟化基团并且不含重金属铂。这些新分子的三重态氧猝灭特性将通过发光光谱和单重态氧量子产率确定。最有希望的候选者将被用于具有高透氧性的一系列常见聚合物的粘合剂测试,然后在模型风洞条件下评估涂料配方和PSP性能的最佳组合。
项目成果
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