一种彩色流场显示技术的研究

 本文介绍了一种色彩丰富、快速简便的流场图形显示技术,具有八色十五区段的显示能力。以快速响应的组合式总压探头对流场中不同截面作高密度扫描,可以得到用不同颜色显示的等参数（如等压、等温……）流场彩色图形。比较有利于研究流体的三维流动。 本文讨论了这种技术所用设备研制中的主要问题。介绍了近期实验所得结果。讨论了这种技术的特点及其可能的应用范围。

STUDY OF A MULTI-COLOUR FLOW FIELD SURVEY TECHNIQUE

A quick and easy multi-colour flow field survey technique has been developed that makes it possible to acquire and present S-colour and 15-detail graphical records of total pressure. This technique should be considered as an utilization and modification of Crowder's technique with light emitting diodes （LED） （ 1 ）.However, the varieties of colour from LEDs are not enough to display total pressure isobar pattern of flow field in more detail. Obviously, the increase of varieties of colour improves spatial resolution of flow field mapping. For this purpose, a multi-colour emitting system with feeding accessory has been made, which enable to yield multi-colour photos of vortex flow field by close scanning of a fast-response total pressure probe.Therefore, a large quantity of useful information can be extracted from them. Its features and potential applications are discussed. Some experimental results are also presented.