TURBINE ROTOR BLADE AND TURBINE

PROBLEM TO BE SOLVED: To reduce a vibration occurrence potential of a rotor blade resulting from an impulse wave on an upstream side of the rotor blade in a steam turbine rotor blade cascade into which wet steam flows as a supersonic flow.SOLUTION: A turbine rotor blade 1 having an area where an inf...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	ONO HIDEKI, NAKAMURA KENJU, MURATA KENICHI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	BLASTING ENGINE PLANTS IN GENERAL HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES STEAM ENGINES WEAPONS
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To reduce a vibration occurrence potential of a rotor blade resulting from an impulse wave on an upstream side of the rotor blade in a steam turbine rotor blade cascade into which wet steam flows as a supersonic flow.SOLUTION: A turbine rotor blade 1 having an area where an inflow Mach number of a working fluid exceeds 1.0 in a blade height direction, includes a concave portion 14 provided on a pressure surface 13 of a profile 10 in the area. The concave portion 14 is located to be close to a front edge 33 rather than a pressure-surface throat position 16 at which a distance between the rotor blade 1 and the adjacent other rotor blade on the pressure surface side is the shortest. 【課題】湿り蒸気が超音速流入する蒸気タービン動翼翼列において、動翼上流側の衝撃波に起因する動翼の振動発生ポテンシャルを低減すること。【解決手段】作動流体の流入マッハ数が1.0を超える領域を翼高さ方向に有するタービン動翼１において、当該領域における翼型１０の圧力面１３上に設けられた凹部１４を備え、当該凹部は、前記圧力面側で前記動翼に隣接する他の動翼との距離が最小となる圧力面スロート位置１６よりも前縁３３側に位置させる。【選択図】図４