非対称軸流中のロータディスク・リムシール内の流れ

概要

論文の詳細を見る
An experimental investigation of fluid flows in a model of gas-turbine rotor disk rim seal has been carried out. The effects of outward throughflow and rotor speed were examined on the distributions of static pressure as well as velocity inside the rim seal when a mainstream was made nonaxisymmetric by stationary vanes. Measurements were made at the mainflow axial Reynolds number of 8.0×10^4. As a radially outward flow is forced to be generated on the rotor by centrifugal force, a radially inward flow due to a mainstream ingestion is originated on the stator of the rim seal when the throughflow rate is decreased beyond the critical value. Once the ingestion occurs locally, the static pressure is increased remarkably just behind the stationary vanes resulting in the circumferentially non-uniform distribution. But the ingestion is suppressed with the increasing throughflow rate and the static pressure distribution tends to be uniform. The critical throughflow rate was found to be about 0.8 times of the outward flow rate caused by a free disk.
一般社団法人日本機械学会の論文
2000-05-25