Stereoscopic PIV measurements in a two-stage axial turbine Luca Porreca, Anestis I. Kalfas, Reza S. Abhari, Yong Il Yun and Seung Jin Song E3S Web Conf., 345 (2022) 01013 Published online: 29 March 2022 DOI: 10.1051/e3sconf/202234501013