Analysis On Heat Transfer Characteristic And Structural Performance Of Radome

Aircraft nose radome plays a major role in guaranteeing the mobility of the aircraft and protecting the interior radar antenna to work effectively from external severe environment.Nowadays the aircraft speed is becoming more and more fast,therewith the aerodynamic heating problem of aircraft radome we faced is severer.So heat transfer emulation of the structure is especially important in radome design process.The aerodynamic heating problem of radome is relatively complex,so analog computation should take the external flow field,structural temperature field and distortion in consideration.Only by building modeling with air flow field and radome structure,considering fluid-structure interaction can we get accurate stress and strain computation of radome under aerodynamic loading.Synthesize aerodynamic characteristic of missile and electric property of radome,this paper mainly focus on one tangent pointed arch missile radome with slenderness ratio2.3,which is made of heat resisting glass fiber and PMI foam composite structure.The work of this paper is around the following three aspects,thermal environment computation under various flight conditions,structural stress analysis and structure stability.First,two dimension and three dimension radome model with consistent size and structure and fluid field are built by ANSYS ICEM.Supersonic flow under various flight conditions are calculated by FLUENT and the heating transfer condition of radome can be obtained.The calculation result of two dimension and three dimension,the heating transfer characteristic of monolayer and foam core sandwich are contrastive analysis.Secondly,three dimension radome entity model is built by Solidworks.Import the model and preceding temperature and pressure computation result to ANSYS Workbench platform for fluid-structure interaction analysis,then the stress and strain calculation result can be obtained to test and verify the strength and stiffness of the foam core sandwich radome.Finally,the stability of missile radome is analysed by eigenvalue method under ANSYS workbench platform to get stability result.So the stability of foam core sandwich radome could be verified.