Effect of shape on structural stability and heat transfer characteristics of corrugated tubes

The effect of convolution height and corner located on transition zone on forming precision, axial compensation capacity, anti-instability capacity, and heat transfer characteristics are analyzed one by one in this paper by experiments, theory checking and simulation. The results show that, for hydroformed corrugated tube, with the increase of corner radius there will be a better forming precision; with the increase of convolution height, there will be a good performance on axial compensation capacity and bad performance on anti-instability capacity and anti-fatigue capacity; with the increase of corner radius and convolution height, the comprehensive heat transfer friction are first increase and then decrease. When the convolution height is 2.5 mm and the corner radius is 30 mm, the hydroformed corrugated tubes have better comprehensive performance.