Device for measuring total pressure of fluid flow

    公开(公告)号:US09696187B2

    公开(公告)日:2017-07-04

    申请号:US14789598

    申请日:2015-07-01

    CPC classification number: G01F1/34 G01P5/14

    Abstract: A device is disclosed for measuring total pressure of a fluid flow comprises a tubular member having an inlet chamber with an inlet opening at a first end of the tubular member. The tubular member also comprises an outlet chamber having an outlet opening at a second end of the tubular member. The inlet opening has a diameter transverse to the longitudinal axis and the outlet opening has a second diameter transverse to the longitudinal axis. The ratio of the first diameter to the second diameter is from 3:1 to 10:1. The tubular member also includes a transitional chamber between the inlet chamber and the outlet chamber. Total pressure can be measured in the inlet chamber.

    Acoustic detection of stall over a wing surface

    公开(公告)号:US11422147B2

    公开(公告)日:2022-08-23

    申请号:US16694303

    申请日:2019-11-25

    Abstract: Apparatus and associated methods relate to detecting turbulence of an airstream over an airfoil surface of an aircraft using a sequence of acoustic transducers attached to the airfoil surface of the aircraft along a path. Each of the sequence of acoustic transducers is configured to detect acoustic waves indicative of airstream condition proximate the acoustic transducer. A processor is configured to determine, for each of the sequence of acoustic transducers, a level of turbulence of the airstream proximate the acoustic transducer.

    BLENDED OPTICAL AND VANE SYNTHETIC AIR DATA ARCHITECTURE

    公开(公告)号:US20220161933A1

    公开(公告)日:2022-05-26

    申请号:US16953807

    申请日:2020-11-20

    Abstract: An optical ice detector and airspeed probe includes an ice detection module and an airspeed module. The ice detection module detects the presence or absence of ice, water, or ice and water particles, and the airspeed module determines a line-of-sight speed along a directional vector, each based on backscatter light returns emitted from a common collimated light source. An electronics module determines an airspeed of an aircraft based on the line-of-sight speed determined by the airspeed module and at least one aircraft parameter received from the air data system.

    ACOUSTIC AIR DATA SENSING SYSTEMS WITH SKIN FRICTION SENSORS

    公开(公告)号:US20200300882A1

    公开(公告)日:2020-09-24

    申请号:US16361005

    申请日:2019-03-21

    Abstract: An acoustic air data sensing system includes an acoustic transmitter, a plurality of acoustic receivers, and a skin friction sensor. The acoustic transmitter is located to transmit an acoustic signal into airflow about an exterior of a vehicle. Each of the acoustic receivers is located at a respective angle from a wind angle reference line and a respective distance from the acoustic transmitter. The skin fiction sensor is positioned in a boundary layer region of the airflow that interacts with the acoustic receivers and transmitter. Based on time of flight values of the acoustic signal from the transmitter to each of the receivers and a skin friction measurement from the skin friction sensor as inputs to a transformation matrix, the acoustic air data sensing system outputs, from the transformation matrix, the true airspeed, the relative wind angle, and the speed of sound for operational control of the vehicle.

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