航空发动机

谢志浩1 ，纪健1 ，刘璐璐 1 ，陈伟1 ，赵振华 2 ，罗刚2.多分散相STF-Kevlar缠绕软壁机匣包容性数值仿真[J].航空发动机,2024,50(6):100-106

多分散相STF-Kevlar缠绕软壁机匣包容性数值仿真

Numerical Investigation on Containment Capability of Soft-Wall Casing Wrapped withPolydispersed STF-Kevla

DOI：

英文关键词:soft-wall casing containment numerical simulation shear thickening fluid aramid fabric aeroengine

基金项目:国家自然科学基金（51575262）资助

作者	单位
谢志浩1 ，纪健1 ，刘璐璐 1 ，陈伟1 ，赵振华 2 ，罗刚2	1.南京航空航天大学能源与动力学院， 2.航空航天结构力学及控制全国重点实验室：南京 210016

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中文摘要:

芳纶织物（Kevlar）缠绕的航空发动机软壁机匣具有质量轻、包容能力强的优点。针对将具有更强抗冲击性能的剪切增稠液（STF）浸渍芳纶织物在航空发动机软壁包容机匣的应用设计，建立了多分散相STF浸渍Kevlar织物缠绕软壁机匣数值模型，开展了不同类型机匣、不同层数织物缠绕机匣及不同叶片转速工况下的机匣包容性能数值仿真研究。结果表明：多分散相STF浸渍Kevlar织物缠绕软壁机匣具有优异的能量吸收能力，其单位质量吸能比纯铝合金机匣的提高了57.4%，比纯Kevlar缠绕软壁机匣的提高了15.2%；织物层数越多，软壁机匣的包容效果越好，3层多分散相STF浸渍Kevlar织物缠绕软壁机匣可使叶片动能降低 94.9%；随着转速增大，机匣会由包容转变为非包容，叶片与机匣的接触力逐渐增大，当发生非包容事件时，铝合金内壁的损伤减小，能量吸收降低。

英文摘要:

The aeroengine soft-wall casing wrapped with aramid fabric (Kevlar) has the advantages of lightweight and strong containment capability. Aiming at the design of the application aramid fabric impregnated with Shear Thickening Fluid (STF), which has stronger impact resistance, on an aeroengine soft-wall containment casing, a numerical model of the soft-wall casing wrapped with polydispersed STF- impregnated Kevlar fabric was established, and numerical investigations on the containment performance of casings of different types, casings with different layers of fabrics, and under operating conditions with different blade rotational speeds were carried out. The results showed that the soft-wall casing wrapped with polydispersed STF-impregnated Kevlar fabric has excellent energy absorption capacity, and its unit mass energy absorption was 57.4% higher than that of pure aluminum alloy casing and 15.2% higher than that of pure Kevlar-wrapped soft-wall cas? ing. The more layers of the fabric, the better the containment effect of the soft-wall casing. The soft-wall casing wrapped with three layers of polydispersed STF-impregnated Kevlar fabric can reduce the kinetic energy of the blade by 94.9%. With the increase of rotational speed, the casing transits from contained to non-contained, and the contact force between the blade and the casing increases. When the non-contained event occurs, the damage to the inner wall of the aluminum alloy decreases, and the energy absorption decreases.

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