1. The role of five-Hole Probe in three-dimensional flow field measurement
Five holes arranged in the probe head can simultaneously measure the pressure distribution in different directions, and then calculate the key aerodynamic parameters of the flow field. Compared with the single-hole probe, which can only provide one-dimensional velocity information, the five-Hole Probe can reflect more comprehensive three-dimensional flow field characteristics.
In wind tunnel experiments or aircraft development, the five-Hole Probe can achieve the following functions:
Obtaining three-dimensional velocity information: Through the pressure difference of five measuring holes, the velocity vector of the flow field can be directly calculated, which avoids the disadvantages of multiple probes or complex postures.
High spatial resolution measurement: The five-Hole Probe is small in size and can realize high-precision local flow field sampling in complex areas (such as wings, trailing vortex areas, and impeller channels).
Strong real-time performance: Combined with Ethernet pressure scanners, it can realize the needs of high-speed synchronous measurement and unsteady flow testing.
2. Advantages of Ethernet pressure scanners in three-dimensional flow field measurement
Ethernet pressure scanners (Pressure Scanner) is a highly integrated pressure acquisition and conversion device, which can synchronously acquire, digitize and transmit pressure signals from multiple channels to the host computer. Its advantages are reflected in:
Multi-channel parallel measurement: Ethernet pressure scanners supports dozens or even hundreds of pressure measurement channels, and can simultaneously collect multiple five-Hole Probe signals to realize synchronous measurement of a wide range of three-dimensional flow fields.
High precision and high stability: Modern Ethernet Intelligent Pressure Scanners are equipped with temperature compensation, automatic zero calibration, multi-point calibration and other functions to ensure excellent measurement accuracy in wide temperature and complex conditions.
Digital output and high-speed communication: Ethernet or IEEE1588V2 synchronous communication technology enables pressure data to be quickly and accurately connected with flow field visualization systems and numerical simulation platforms to improve data processing efficiency.
Maintenance-free and reliability: The integrated pneumatic valve circuit and self-diagnostic function make Ethernet pressure scanners stable and reliable in long-term test tasks.
3. Synergistic advantages of Ethernet pressure scanners and five-Hole Probe
In three-dimensional flow field measurement, five-Hole Probe provides local point pressure information, and to convert these signals into usable three-dimensional flow field data efficiently and accurately, the role of Ethernet pressure scanners is indispensable. After the combination of the two, a relatively complete collection system is formed:
Multi-point synchronous acquisition: By arranging multiple five-Hole Probe in the target area and connecting their outputs to Ethernet pressure scanners, the synchronous sampling of the entire three-dimensional flow field can be realized, greatly improving the measurement efficiency.
Complex flow field solution: five-Hole Probe outputs differential pressure signals in multiple directions, and Ethernet pressure scanners can provide high-precision, low-noise acquisition results to ensure reliable parameters such as angle of attack, sideslip angle, and velocity vector.
Fully automated measurement platform: Combined with the 3D motion control system, five-Hole Probe and Ethernet pressure scanners can realize automatic scanning and synchronous data acquisition, thereby completing high-resolution 3D flow field reconstruction.
Response to unsteady flow: In high-speed aerodynamic experiments or turbine machinery, the flow field is often unsteady. High acquisition power Ethernet pressure scanners combined with sensitive five-Hole Probe capture transient flow characteristics in real time.
4. Advantages and services of Windtuner
Windtuner Technology has profound technical accumulation in the R&D, design and production of Ethernet pressure scanners and five-Hole Probe, and can provide customized solutions:
Custom design: According to the user's experimental needs and application scenarios, Windtuner can design five-Hole Probe of different sizes and structural forms, as well as Ethernet pressure scanners with multi-channel and high-speed acquisition capabilities.
High-precision calibration service: Relying on a professional CNAS-accredited calibration wind tunnel laboratory, Windtuner can accurately calibrate Ethernet pressure scanners and five-Hole Probe to ensure their output data to international standards.
