Patents by Inventor Promode R. Bandyopadhyay

Promode R. Bandyopadhyay has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5303882
    Abstract: A corner vortex forms at the corners of a square or rectangular wind tunnel or water tunnel and disrupts the flow and creates excessive drag, turbulence, noise and wake. The corners defined by a wing/fuselage interface creates the same type of situation. The suppressor provides many small corners to prevent forming of the single large vortex. A honeycomb or mesh provides parallel passageways, each having a size that is a fraction (1/5th to 1/10th) of the depth of the boundary layer (defined as that point in the fluid flow where the velocity is 99% of free stream velocity.
    Type: Grant
    Filed: February 22, 1993
    Date of Patent: April 19, 1994
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Promode R. Bandyopadhyay
  • Patent number: 5178004
    Abstract: A housing block is provided having an upper surface conforming to the test surface of a model or aircraft. An oil film is supplied upstream of a transparent wedge window located in this upper surface by an oil pump system located external to the housing block. A light source located within the housing block supplies a light beam which passes through this transparent window and is reflected back through the transparent window by the upper surface of the oil film to a photo-sensitive position sensor located within the housing. This position sensor allows the slope history of the oil film caused by an aerodynamic flow to be determined. The skin friction is determined from this slope history. Internally located mirrors augment and sensitize the reflected beam as necessary before reaching the position sensor. In addition, a filter may be provided before this sensor to filter the beam.
    Type: Grant
    Filed: August 8, 1991
    Date of Patent: January 12, 1993
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Promode R. Bandyopadhyay, Leonard M. Weinstein