空调末端分布对长直隧道内空气温度稳定性的影响

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中图分类号：TU831 文献标志码：A

Abstract： A wave oscillator device is installed in a 4Oo-meter-long tunnel， necessitating stringent control of the tunnel's air temperature.Due to the high heat dissipation of equipment and the confined space within the tunnel， a constant-air-volume （CAV） all-air system with ceiling supply （multiple supply terminals） and centralized return air at both ends is adopted. The system employs high-precision control and large airflow with small temperature difference supply to meet the design requirements for temperature control accuracy. Computational fluid dynamics （CFD） simulations are conducted to compare the effects of three different air-conditioning terminal distribution schemes— each with equal number of supply outlets and airflow volume—on temperature control precision within the tunnel. Scheme 1 features uniformly distributed outlets spaced every 3.35m ；Scheme 2 places outlets at wider intervals near both ends，gradually decreasing toward the tunnel center; Scheme 3 reverses Scheme 2's pattern， with outlet spacing increasing toward the tunnel center.Results indicate that Scheme 3 best satisfies the tunnel's temperature gradient criteria， achieving an average air temperature of and an axial temperature gradient below 0.1∘C/（5m） . This research provides an engineering reference for highprecision temperature regulation in similar long straight tunnels with ducted air supply.

Keywords： long straight tunnel ventilation;airflow organization; computational fluid dynamics；simulation；large scientific facility；temperature gradient

同步辐射光源等大科学装置对现代科学发展起到重要的作用，并为化学实验、材料科学、生命科学、环境科学等提供了先进的实验平台[-2]。（剩余9522字）