本发明提供一种反映堆芯导向管栅元热工水力特性的实验装置及设计方法，基于水力当量直径和热力当量直径均与待研究栅元相同的设计准则，考虑冷壁效应，采用内管周向均匀加热和外管周向部分加热的方式来模拟导向管栅元，并通过调整内管与外管各个方向的偏心距来模拟各方向棒弯曲行为。本发明克服了传统大规模棒束CHF实验装置的不足，为复杂条件下棒束热工水力实验研究提供新的技术支持。

The invention provides an experimental device and a design method reflecting the thermal hydraulic characteristics of a core guide tube lattice. Based on the design criteria that the hydraulic equivalent diameter and thermal equivalent diameter are the same as that of the lattice to be studied, and considering the cold wall effect, the method of uniform heating of the inner tube and partial heating of the outer tube is adopted to simulate the guide tube lattice. By adjusting the eccentricity of each direction of the inner tube and the outer tube, the bending behavior of the rod in each direction is simulated. The invention overcomes the deficiency of the traditional large-scale rod bundle CHF experimental device and provides new technical support for the thermal hydraulic experimental research of bundle at complex conditions.