... taking full advantage of hydro, and reliable operation ,turbine select is one of the main design task in ... x Qc x H x Overall EfficiencySuitable for Tubular Turbine .Q=1.62m3/s-53.6m3/s . ... excavation,large flow and high efficiency,the tubular type is suitable for low head and large flow ... of the same capacity, tubular turbine runner diameter smaller than the axial type.And under the same conditions, the ...