Vatell Heat Flow Meter-TG-1000-0

Vatell heat flow meter TG-1000-0Belonging to the "Gardon Gauge" total heat flux sensor, it can continuously measure the "radiation+convection" total heat flux density and is commonly used in aviation engines

High heat flow environments such as space re-entry and combustion chambers. The core features and parameters are as follows:

working principle0.312-inch circular copper foil is welded to the center of the copper heat sink; The heat flow causes a radial temperature gradient in the foil, and the temperature difference between the center and edge of the foil is measured by an embedded thermocouple,

The output thermoelectric potential is proportional to the heat flux density, with good linearity and almost no influence from surface temperature.

Structure and CoolingThe main body is water-cooled and continuously cooled, which can be exposed to high heat flux for a long time without any "maximum measurement time" limit; The sensor housing and heat sink are both made of copper, ensuring high thermal conductivity and heat capacity,

Suppress zero drift. Main technical parameters (typical values) Range: 0-5 W cm ⁻ ² (low) to 0-5 000 W cm ⁻ ² (high) Sensitivity: ≈ 2 mV/(W cm ⁻ ²) Calibration accuracy: ± 3% Repeatability: 1% Response time: millisecond level (naturally fast round foil structure) Working surface temperature: ≤ 300 ° C (maintained by water cooling) Installation size: φ 7.9 mm × 25 mm (standard head)

Typical ApplicationsAerospace wind tunnel/plasma arc heater: Re entry thermal protection test, thermal distribution mapping of aircraft engine combustion chamber and booster cylinder, transient/steady-state thermal assessment of rocket injection panel, gas rudder, etc. can be used as the "total heat flux" benchmark, and used in conjunction with Vatell TG-9000 radiometer to provide radiation and convection components respectively.

Key points for useClean closed-loop water cooling (flow rate ≥ 0.3 L min ⁻¹, water temperature ≤ 30 ° C) must be used, otherwise it is easy to cause reading drift due to vapor film. The head should be installed flush with the surface of the model, and misalignment>0.2 mm will introduce errors in convective "suction/blowing". After each hot test, a "zero point recheck" should be performed - record the output under no heat flow conditions, and recalibrate if the drift is greater than 1%. Factory calibration of graphite rod radiation source based on NIST traceability; If there are significant differences in the working frequency band or gas composition (such as rich combustion gas containing carbon smoke), it is recommended to perform comparative calibration on site. In shortVatell TG-1000 heat flow meterIt is a "water-cooled round foil total heat flux sensor" with ultra wide range, millisecond response, and long-term stability, suitable for 5-5000 W cm ⁻ ²

Research and industrial thermal testing in high heat flux density areas.