Simulation and experiment research on wide ranging working process of scroll expander driven by compressed air
Simulation and experiment research on wide ranging working process of scroll expander driven by compressed air
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DOI：
10.1016/j.applthermaleng.2010.05.015
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发表时间：
2010-10
影响因子：
6.4
通讯作者：
Guangbin Liu;Yuanyang Zhao;Lian-sheng Li;P. Shu
中科院分区：
文献类型：
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作者：
Guangbin Liu;Yuanyang Zhao;Lian-sheng Li;P. Shu
涡旋膨胀机广泛应用于小型能量回收系统中，用于从压缩空气中回收机械能。本文建立了考虑吸力损失、泄漏损失、换热损失和排放损失的模拟模型。通过与实验结果的比较，验证了该仿真模型的有效性。实际工作过程与理想过程的偏差归因于泄漏和换热。膨胀开始时，燃烧室的质量随旋转角的增大先减小后增大。功率输出随转速的升高而增大，在1740-2340转/分的转速范围内，模拟功率与测量结果吻合较好。输送效率和充气效率随转速增大而增大，最大充气效率为0.69，间隙为0.04 mm。通过减小涡旋之间的径向和轴向间隙，可以提高体积效率。吸气和排气压力损失均随转速的增大而增大。
Scroll expanders are widely used in the small energy recovery systems to recover mechanical energy from compressed air. A simulation model has been developed in this paper by taking the suction loss, leakage loss, heat transfer loss, and discharge loss into consideration. This simulation model is validated by comparison with the experimental results. The deviation of the actual working process from the ideal process is attributed to the leakage and heat transfer. The mass in the chamber decreases with the increase of rotation angle at the beginning of expansion first and then increases. The power output increases with a rise in rotating speed and the simulated power agrees well with the measurement at the rotating speed of 1740–2340 rpm. The delivery and the volumetric efficiency increase with rotating speed and the maximum volumetric efficiency is 0.69 with the clearance of 0.04 mm. The volumetric efficiency could be improved by reducing the radial and axial clearances between scrolls. Both the suction and discharge pressure loss increase with the rotating speed.