further compares the hysteresis loops at the same frequency
(60 Hz) but with different loads. In general the loops for
both the volutes remain similar in shape but expand notably outwards
and shift along the steady curves to the higher pressure ratio
as the load increases. This clearly demonstrates the increasing
mass imbalance in the turbine as load increases. However, the
shape of the loops together with the variation trend is quite similar
between the two volutes at different loads.