Abstract
Based on the traditional elastic tube bundle (ETB) heat exchanger, an improved elastic tube bundle (IETB) heat exchanger with ETB structure upgraded and baffles installed was proposed to study its comprehensive heat transfer performance. The influence of inlet velocity and baffles installation on IETBs vibration and heat transfer features were studied. Numerical results show that the IETB heat exchanger has obviously improved the comprehensive heat transfer performance. The average amplitude of out-of-plane vibration and the heat transfer features of IETBs is significantly elevated by increasing inlet velocity and installing baffles. With the inlet velocity increased and baffles installation, the average amplitude of out-of-plane vibration of IETBs is improved maximum by 616.19% and 26.06%, the average heat transfer coefficient (HTC) is improved maximum by 97.89% and 23.24%, and the performance evaluation criteria (PEC) of IETBs is improved maximum by 3.45% and 2.06%, respectively. In addition, while the installation of the baffles can restrain the total vibration of IETBs (maximum reduction, 4.60%), it can strengthen the heat transfer capacity of IETB heat exchanger.
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