Accurate and Efficient Thermal Analysis of Slow Wave Structures for Helix Traveling-Wave Tubes by Finite-Element Method
| Autor: | Peng Xie, Bin Li, Si-Yi Yang, Shucheng Huang, Song-Zhi Wu, Hao Song, Li Xu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Thermal resistance Thermal contact Mechanics Traveling-wave tube 01 natural sciences Finite element method Electronic Optical and Magnetic Materials law.invention Thermal conductivity law 0103 physical sciences Helix Thermal Boundary value problem Electrical and Electronic Engineering |
| Zdroj: | IEEE Transactions on Electron Devices. 68:1905-1911 |
| ISSN: | 1557-9646 0018-9383 |
| DOI: | 10.1109/ted.2021.3059179 |
| Popis: | In slow wave structures (SWSs) for helix traveling-wave tubes, both thermal conductivities (TCs) of materials and thermal contact resistances (TCRs) are temperature-dependent, which have a great influence on the heat dissipation of helix SWSs. This article presents an accurate and efficient thermal analysis method of helix SWSs by finite-element method (FEM). In this method, a novel contact boundary condition (CBC) approach is proposed. This CBC approach can easily integrate various TCR models to simulate temperature-dependent TCRs accurately and conveniently. Specially for double nonlinearities arising from temperature-dependent TCs and TCRs within helix SWSs, a fast nonlinear solver named FMONS is also proposed to significantly improve the efficiency of the thermal simulation for helix SWSs. Based on this method, we further developed a 3-D thermal design tool for helix SWSs called TS2. Different from all the present FEM codes, for example, ANSYS, our TS2 can directly model temperature-dependent TCRs. By simulating various helix SWSs including a global model of the entire helix SWS, it is found that our TS2 has very high accuracy and efficiency in the thermal analysis of helix SWSs, which would be very useful for the design of high-power helix traveling-wave tubes. |
| Databáze: | OpenAIRE |
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