Aero-engine inlet testing has strict requirements for "high temperature resistance, vibration resistance, and high precision" of probes, requiring four strict verification steps for selection.Sensor Calibrationwelcome to click on the website to learn more!
Full Selection Process:
1. Scenario Parameter Sorting:
- Environment: 300-600℃, vibration frequency 500-2000Hz, airflow velocity 150-300m/s (subsonic);
- Measurement requirements: total pressure, static pressure, airflow deflection angle (±20°), accuracy requirement ≤1%FS.
2. Material and Structure Screening:
- Excluding plastic/ordinary stainless steel, Inconel 718 superalloy was selected (resistant to 600℃ + vibration);
- 5-hole probe structure was chosen (sufficient for 2D flow fields, more vibration-resistant than 7-hole probes), with reinforced head treatment (wall thickness increased to 1.5mm).
3. Parameter Matching Verification:
- Response time: <5ms (meeting dynamic airflow measurement);
- Calibration cycle: ≤500 hours (for high-frequency use scenarios);
- Compatibility with DAQ system: supports 4-20mA signal (to avoid electromagnetic interference).
4. Actual Test Verification:
In a certain engine model test, initial use of a 7-hole probe caused data drift due to vibration. After replacing with a 5-hole vibration-resistant model, the error remained stable within 0.8% during 8-hour continuous testing.
Attached Core Parameter Table:
|Parameter|Selected Value|Verification Standard|
|Material|Inconel 718|Strength ≥800MPa at 600℃|
|Number of holes|5 holes|Deflection angle measurement error ≤±1°|
|Response time|3ms|Dynamic airflow tracking accuracy ≥98%|
|Vibration resistance grade|2000Hz/10g acceleration|Zero drift after vibration ≤0.1%FS|