Main Article Content
Abstract
A lookup method for extracting flow field information from five hole probe measurements is presented. The look up table method consists of two step interpolation. In the first step, the calibration space is divided into a large number of small intervals of yaw and pitch coefficients (0.1, 0.05 or 0.01) and the required quantities are interpolated using local cubic spline interpolation technique. The interpolated values are stored in a large square matrix. In the second step, the measured values of yaw and pitch coefficients are used to determine yaw and pitch angles by linear interpolation. Same procedure is used to determine total and static pressure coefficients. Additional data taken during the calibration is used for validating lookup table method and spline interpolation method. The errors from the look up table method, particularly with the interval of 0.01 are about the same or lower than those obtained from the spline interpolation method. The computational times for lookup table method are found to be lower than that for the spline interpolation method. The lookup table method seems to be attractive when a large amount of five hole probe data is to be processed and in cases where online data processing is required.
Keywords
Article Details
References
- Treaster, A. L. and Yocum, A. M., "The Calibration and Application of Five-hole Probes", Instrumentation Society of America Transactions, Vol.18, No.3, pp.23-34.
- Yasa, T. and Paniagua, G., "Robust Procedure for Multi-hole Probe Data Processing", Flow Measurement and Instrumentation 26, 2012, pp.46-54.
- Lueptow, R. M., Breuer, K. S. and Haritonidis, J. H., "Computer-aided Calibration of X-probes Using a Look-up Table", Experiments in Fluids, Vol.6, 1988, pp.115-118.
- Maciel, Y. and Gleyzes, C., "Survey of Multi-wire Probe Data Processing Techniques and Efficient Processing of Four-wire Probe Velocity Measurements in Turbulent Flows", Experiments in Fluids, Vol.29, 2000, pp. 66-78.
- Wenger, C. W. and Devenport, W. J., "Seven-Hole Pressure Probe Calibration Method Utilizing Look- Up Error Tables", AIAA Journal, Vol.37, No.6, 1999, pp.675-680.
- Jangir Ravirai., Sitaram, N. and Gajanan, Ct., "A Miniature Four-hole Probe for Measurement of Three-Dimensional Flow with Large Gradients", International Journal of Rotating Machinery, Vol.2014, Article ID297861, 12 pages, http://dx. doi.org/10.1155/2014/297861.
- Venkateswara Babu, C., Govardhan, M. and Sitaram, N., "A Method of Calibration of Seven Hole Pressure Probe for Measuring Highly Three Dimensional Flows", Measurement Science and Technology, Vol.9, No.3, pp.468-476.
- Suresh, M. and Sitaram, N., "Extended Calibration of a Four Hole Probe for Three Dimensional Flow Measurements", International Journal of Rotating Machinery, Vol.2016, Article ID 5327297, 2016, 12 Pages.
- Gajanan and Sitaram, N., "Sub Miniature Four Hole Probe for Three Dimensional Wake Measurements", Proceedings of the IEEE National Conference on Recent Advances in Mechanical Engineering (RAME-2014), February 7, 2014, pp.31-40, Chennai, Tamil Nadu.
References
Treaster, A. L. and Yocum, A. M., "The Calibration and Application of Five-hole Probes", Instrumentation Society of America Transactions, Vol.18, No.3, pp.23-34.
Yasa, T. and Paniagua, G., "Robust Procedure for Multi-hole Probe Data Processing", Flow Measurement and Instrumentation 26, 2012, pp.46-54.
Lueptow, R. M., Breuer, K. S. and Haritonidis, J. H., "Computer-aided Calibration of X-probes Using a Look-up Table", Experiments in Fluids, Vol.6, 1988, pp.115-118.
Maciel, Y. and Gleyzes, C., "Survey of Multi-wire Probe Data Processing Techniques and Efficient Processing of Four-wire Probe Velocity Measurements in Turbulent Flows", Experiments in Fluids, Vol.29, 2000, pp. 66-78.
Wenger, C. W. and Devenport, W. J., "Seven-Hole Pressure Probe Calibration Method Utilizing Look- Up Error Tables", AIAA Journal, Vol.37, No.6, 1999, pp.675-680.
Jangir Ravirai., Sitaram, N. and Gajanan, Ct., "A Miniature Four-hole Probe for Measurement of Three-Dimensional Flow with Large Gradients", International Journal of Rotating Machinery, Vol.2014, Article ID297861, 12 pages, http://dx. doi.org/10.1155/2014/297861.
Venkateswara Babu, C., Govardhan, M. and Sitaram, N., "A Method of Calibration of Seven Hole Pressure Probe for Measuring Highly Three Dimensional Flows", Measurement Science and Technology, Vol.9, No.3, pp.468-476.
Suresh, M. and Sitaram, N., "Extended Calibration of a Four Hole Probe for Three Dimensional Flow Measurements", International Journal of Rotating Machinery, Vol.2016, Article ID 5327297, 2016, 12 Pages.
Gajanan and Sitaram, N., "Sub Miniature Four Hole Probe for Three Dimensional Wake Measurements", Proceedings of the IEEE National Conference on Recent Advances in Mechanical Engineering (RAME-2014), February 7, 2014, pp.31-40, Chennai, Tamil Nadu.