10~35kV电力互感器一体化试验方法研究和平台设计

10~35 kV电力互感器生产企业的技术门槛不高,产品需求量大,使用广泛,导致产品质量良莠不齐。全性能检测是提高互感器质量的有效手段,但受目前检测能力、效率的限制,一般仅对误差、变比、励磁特性等几个检测项目的首次检定比较重视,检测环节、和检测项目不能完全满足保证互感器高质、高效运行的需要。本文将开展10~35 kV电力互感器全性能评价技术研究,实现对10~35 kV电力互感器全性能准确高效检测,提高10~35 kV电力互感器的运行可靠性和计量准确性,保障电网的安全、稳定、可靠、准确运行。

复合材料变厚度加筋板后屈曲耐久性/损伤容限一体化设计研究

在先进的复合材料飞机结构上大量采用复合材料加筋板这种结构形式。因此,本文着重研究了复合材料变厚度加筋板后屈曲、冲击损伤与冲击损伤对承载能力的影响,以及复合材料变厚度加筋板冲击损伤、后屈曲、耐久性/损伤容限设计一体化综合试验方法。最后,作者根据多年从事飞机型号结构设计经验,并结合本文的研究结果,总结出15项复合材料变厚度加筋板后屈曲耐久性/损伤容限一体化设计技术,以期对我国预研新机的复合材料飞机结构设计,对已研飞机的复合材料飞机结构改进、评定有所启示。

高效多模式混合推进垂起无人机动力系统研究

针对现有商用工业级垂起无人机在面向新一代无人业务时的长垂直机动时间的研制需求,设计了一种起飞重量约20kg级的垂起无人机高效多模式混合推进动力系统,该系统以发动机、太阳能以及锂电池作为动力源,详细介绍了动力系统的开发方法及软件测控方式,通过一体化验证试验方法对动力系统进行了地面台架及试飞平台验证。试验结果表明,设计的动力系统能够满足中型商用垂起无人机功率及任务需求,能够提升传统垂起无人机垂直机动时间,具有较好的应用前景。

Experimental validation of an integrated optimization design of a radial turbine for micro gas turbines

The aerodynamic performance, structural strength, and wheel weight are three important factors in the design process of the radial turbine for micro gas turbines. This study presents the experimental validation process of this integrated optimization design method by using the similarity theory. Cold modeling tests and investigations into the aerodynamic characteristics were performed. Experimental results showed that the aerodynamic efficiency of the micro radial turbine is 84.3% at the design point while also satisfying the aerodynamic and strength requirements. Meanwhile, the total weight of the turbine wheel is 3.8 kg which has only a 52.8% mass of the original design. This indicates that the radial turbine designed through this technique has a high aerodynamic performance, and thus can be applied to micro gas turbines. The results validated that this integrated optimization design method is reliable.