Optimization Design of Heat Dissipation Structure for Rotating Anode CT Tube Based on Simulation Analysis

This study focuses on optimizing the heat dissipation structure of the CT tube to improve its radiative heat dissipation efficiency. The CT tube generates X-rays when an electron beam strikes the anode target, releasing substantial thermal energy. Excessive heat accumulation can damage the CT tube due to elevated temperatures. To ensure the long-term stable operation of the CT tube, this paper proposes enhancements to its thermal radiation dissipation through structural design. Initially, a heat transfer model of the CT tube is created using Fluent software, and a mathematical model is developed in MATLAB to calculate the surface view factor. This model investigates the relationship between surface angle factors and net radiative heat exchange, facilitating the design of an efficient radiative heat dissipation structure. The simulation results and calculations reveal that the view factor between the target and the shell surface significantly influences radiative heat exchange. When the target and the shell surface are parallel, the angle factor reaches its maximum, maximizing the net radiative heat received by the tube shell and optimizing heat dissipation efficiency, leading to an improvement of approximately 40% over the initial structure. Conversely, as the tilt angle of the target increases, the angle factor between the two surfaces decreases, resulting in a gradual reduction in radiative heat dissipation. This research provides both a theoretical foundation and a computational model for optimizing the heat dissipation structure of CT tubes, effectively reducing simulation computation time and enhancing design efficiency.