Test environments, wind tunnels including the same, and methods of using the same

    公开(公告)号:US11835427B2

    公开(公告)日:2023-12-05

    申请号:US17889132

    申请日:2022-08-16

    摘要: In an embodiment, a test section comprises at least one surface defining an at least partially enclosed space. The at least partially enclosed space defines an airflow path for air to flow. The test section also comprises a nozzle disposed in the at least partially enclosed space. The nozzle is configured to spray an agricultural spray and is positioned to emit the agricultural spray such that at least a section of the agricultural spray exhibits a non-parallel angle relative to the airflow path defined by the at least partially enclosed space. The test section further comprises at least one stimulus source positioned to illuminate at least a portion of the agricultural spray adjacent to the nozzle. Additionally, the test section comprises at least one detector positioned to image at least the portion of the agricultural spray adjacent to the nozzle.

    HIGH-ORDER VORTEX VIBRATION WIND TUNNEL TEST MODEL SYSTEM FOR LONG-SPAN BRIDGE AND TEST METHOD THEREOF

    公开(公告)号:US20230160777A1

    公开(公告)日:2023-05-25

    申请号:US17823161

    申请日:2022-08-30

    IPC分类号: G01M9/06 G01M9/04

    CPC分类号: G01M9/062 G01M9/04

    摘要: A vortex vibration wind tunnel test model system for a long-span bridge and a test method thereof is disclosed. In the test model system, the base is provided with a plurality of adjustment members, each of the adjustment members is provided with a cantilever rod, and all of the cantilever rods are cantilevered in the same direction; a beam body model is provided on a cantilevered end of all of the cantilever rods; a displacement measuring member is provided below the cantilever rod, and the horizontal distance between the displacement measuring member and the beam body model exceeds 2 times a width value of the beam body model, the displacement measuring member being away from the surface of the beam body model and the position of directly below the beam body model. Therefore, the state response data of the position of the cantilever rod can be collected in real time. By calculating the state response data of the cantilever end of the cantilever beam, the state response data of the beam body model is obtained, which effectively reduces the damping of the model system and improves the accuracy of the model technical parameters. The test method is simple and reliable, which improves the real reliability of the wind tunnel test data, and can effectively meet the requirements of the high-order vortex vibration wind tunnel test for the long-span bridge.

    Parameter similarity method for test simulation conditions of aerodynamic heating environment

    公开(公告)号:US11454566B2

    公开(公告)日:2022-09-27

    申请号:US16647432

    申请日:2019-03-21

    发明人: Dechuan Sun Ming Lu

    IPC分类号: G01M9/06 G01M9/02 G01N25/18

    摘要: A parameter similarity method for test simulation conditions of an aerodynamic heating environment is disclosed. With respect to the requirement that the adiabatic wall enthalpy and the cold-wall heat flux are equal in the simulation test of the aerodynamic heating environment, a method that can ensure the similarity of ground test parameters and flight parameters without the equal adiabatic wall enthalpy is proposed, and solves the problems of relying on the equal adiabatic wall enthalpy and making it difficult to accurately simulate the real aerodynamic heating environment in the current test simulation method, and provides guarantee for heat transfer and ablation test research of thermal protection/insulation material under the high temperature aerodynamic heating environment. The test conditions are not affected by the value of the adiabatic wall enthalpy. According to the method, most test devices can simulate the aerodynamic heating environment with high enthalpy.

    Dynamic five-hole probe
    8.
    发明授权

    公开(公告)号:US11422057B2

    公开(公告)日:2022-08-23

    申请号:US16612873

    申请日:2017-10-31

    IPC分类号: G01M9/06 G01P5/165 G01F1/46

    摘要: A dynamic five-hole probe includes a pressure sensing part, a pressure measuring hole transition section, a pressure acquisition section, dynamic pressure sensors and flexible wall pressure buffering tubes, the pressure sensing part being provided with pressure measuring holes to sense three dimensional dynamic pressure components of an airflow; the pressure measuring hole transition section transits from an inlet end surface five-hole structure into an outlet end surface five-hole structure; the pressure acquisition section has therein a centrally symmetric pressure measuring hole structure; pressure sensor mounting holes are in communication with the five pressure measuring holes; each of the dynamic pressure sensors is mounted in a corresponding one of the sensor mounting holes to measure a dynamic pressure of the airflow. The pressure sensing part may have a diameter of 3 mm or less.