  Minute amount of long chain flexible polymer dissolved in a turbulent flow
can drastically change flow properties, such as reducing the drag and enhancing
mixing. One fundamental riddle is how these polymer additives interact with the
eddies of different spatial scales existing in the turbulent flow and in turn
alter the turbulence energy transfer. Here we show how turbulent kinetic energy
is transferred through deferent scales in the presence of the polymer
additives. In particular, we observed experimentally the emerging of a new
scaling range, referred to as the elastic range, where increasing amount of
energy is transferred by the elasticity of the polymers. In addition, the
existence of the elastic range prescribes the scaling of high-order velocity
statistics. Our findings have important implications to many turbulence systems
such as turbulence in plasmas or superfluids where interaction between
turbulent eddies and other nonlinear physical mechanisms are often involved.
