Probe measurements in multi-dimensional reacting flows
Abstract
The time mean response of pressure and sampling probes to pressure, density, and velocity fluctuations in turbulent reacting flows is examined by averaging over the instantaneous probe response. Corrections for fluctuation effects are found to be necessary if data obtained by these probes are to be used to find mean velocity and concentration information. Correction terms for pressure probe readings are well founded and of general applicability, while sampling probe correction terms are well founded only if the sample flow is choked at the probe inlet, a state which may be difficult to achieve in practice. Also, probe induced flow field perturbations are discussed for measurements in swirling flow. It is recommended that to avoid perturbations the smallest possible probes be used and that combustion conditions be monitored, e.g., with wall pressure taps, during probe insertion in order to detect perturbations should they occur.
- Publication:
-
In AGARD Testing and Meas. Tech. in Heat Transfer and Combust. 14 p (SEE N81-12993 03-99
- Pub Date:
- September 1980
- Bibcode:
- 1980tmth.agar.....G
- Keywords:
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- Density Measurement;
- Pressure Measurement;
- Probes;
- Turbulent Flow;
- Velocity Measurement;
- Combustion Physics;
- Flow Distribution;
- Fluid Mechanics and Heat Transfer