Siemens Vdo Automotive Corporation

Siemens Automotive Corporation

Siemens Canada Limited

Seimens Vdo Automotive Corporation

William Holmes

Frank Stauder

Sylvain Nadeau

Alexander Graham Hunt

Michael S Selig

Ian Lockley

A turbomachine for moving air includes a shroud disposed about an axis A. The shroud has a pair of opposing faces and defining a gap therebetween. The opposing faces are disposed generally transversely with respect to the axis. A rotor assembly is mounted for rotation about the axis. The rotor assembly has a plurality of blades with tips of the blades being coupled to an annular band . At least a portion of the annular band is disposed in the gap . Seal structure extends from each opposing face of the shroud and into the gap to reduce swirl and minimize air leakage across the gap.

Turbomachine with double-faced rotor-shroud seal structure

A turbomachine for moving air comprising includes a shroud disposed about a longitudinal axis and a rotor assembly mounted for rotation about the longitudinal axis. The rotor assembly has a plurality of blades and tips of the blades are coupled to an annular band. The annular band is disposed with respect to the shroud so as to define a gap extending continuously between an outer surface of the annular band and an inner surface of the shroud. A seal structure extends from the inner surface of the shroud and into the gap. The seal structure has a density sufficient to reduce swirl in recirculating airflow and to minimize air leakage across the gap.

Turbomachine shroud fibrous tip seal

An axial flow fan for producing airflow through an engine compartment of a vehicle includes a hub rotatable about an axis . An annular band is concentric with the hub and spaced radially outward from the hub. A plurality of fan blades are distributed circumferentially around the hub and extend radially from the hub to the annular band. Each blade is constructed and arranged to ensure that the fan can operate at high speed and low torque.

High speed, low torque axial flow fan

Airfoils having high lift to drag characteristics at low Reynolds number are disclosed. The airfoils including a leading edge , a trailing edge spaced from the leading edge, an upper surface extending from the leading edge to the trailing edge, and a lower surface extending from the leading edge to the trailing edge. An airfoil designed for a tip region of a blade has a thickness in a range of 3% to 13%, a Reynolds number in a range from 120,000 to 400,000, and a maximum lift coefficient in a range from 1.0 to 1.2. An airfoil designed for a midspan region of a blade has a thickness in a range of 3% to 13%, a Reynolds number in a range from 90,000 to 200,000, and a maximum lift coefficient in a range from 1.4 to 1.6. An airfoil designed for a root region of a blade has a thickness in a range of 5% to 15%, a Reynolds number in a range from 60,000 to 120,000, and a maximum lift coefficient in a range from 1.8 to 2.0.

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London, Canada

William Holmes