Heat flux measurement techniques

Abstract Heat flux measurement is used in the field of fluid mechanics and heat transfer to quantify the transfer of heat within systems. Several techniques are in common use, including: differential temperature sensors such as thermopile, layered resistance temperature devices or thermocouples and Gardon gauges; calorimetric methods involving a heat balance analysis and transient monitoring of a representative temperature, using, for example, thin-film temperature sensors or temperature sensitive liquid crystals; energy supply or removal methods using, for example, a heater to generate a thermal balance; and, finally, by measurement of mass transfer which can be linked to heat transfer using the analogy between the two. No one method is suitable to all applications because of the differing considerations of accuracy, sensitivity, size, cost and robustness. Recent developments including the widespread availability and application of thin-film deposition techniques for metals and ceramics, allied with advances in microtechnology, have expanded the range of devices available for heat flux measurement. This paper reviews the various types of heat flux sensors available, as well as unique designs for specific applications. Critical to the use of a heat flux measurement technique is accurate calibration. Use of unmatched materials disturbs the local heat flux and also the local convective boundary layer, producing a potential error that must be compensated for. The various techniques in common use for calibration are described. A guide to the appropriate selection of a heat flux measurement technique is provided according to the demands of response, sensitivity, temperature of operation, heat flux intensity, manufacturing constraints, commercial availability, cost, thermal disturbance and acceleration capability for vibrating, rotating and reciprocating applications.

[1]  Terry V. Jones,et al.  The response time of a surface thermometer employing encapsulated thermochromic liquid crystals , 1987 .

[2]  Gustave C. Fralick,et al.  Steady-State and Frequency Response of a Thin-Film Heat Flux Gauge , 1997 .

[3]  R. J. Goldstein,et al.  A review of mass transfer measurements using naphthalene sublimation , 1995 .

[4]  Thomas E. Diller,et al.  Advances in Heat Flux Measurements , 1993 .

[5]  Roger W. Ainsworth,et al.  Developments in Instrumentation and Processing for Transient Heat Transfer Measurement in a Full-Stage Model Turbine , 1989 .

[6]  Anil K. Kulkarni,et al.  Analysis of heat flux measurement by circular foil gages in a mixed convection/radiation environment , 1991 .

[7]  P. Mendes,et al.  The naphthalene sublimation technique , 1991 .

[8]  T. V. Jones,et al.  Heat-transfer measurements in short-duration hypersonic facilities , 1973 .

[9]  H. Martin.  Heat and Mass Transfer between Impinging Gas Jets and Solid Surfaces , 1977 .

[10]  G. Fralick,et al.  An Experimental Study of a Radially Arranged Thin Film Heat Flux Gauge , 1997 .

[11]  John Aurie Dean,et al.  Handbook of Organic Chemistry , 1987 .

[12]  R. Gardon.  A Transducer for the Measurement of Heat-Flow Rate , 1960 .

[13]  Robert Gardon,et al.  An Instrument for the Direct Measurement of Intense Thermal Radiation , 1953 .

[14]  K.G.T. Hollands,et al.  The Measurement of Surface Heat Flux Using the Peltier Effect , 1989 .

[15]  T. V. Jones,et al.  On-Line Computer for Transient Turbine Cascade Instrumentation , 1978, IEEE Transactions on Aerospace and Electronic Systems.

[16]  J. E. Doorly.  Procedures for Determining Surface Heat Flux Using Thin Film Gages on a Coated Metal Model in a Transient Test Facility , 1987 .

[17]  J. A. Pope,et al.  Convective Heat Transfer to Gas Turbine Blade Surfaces , 1954 .

[18]  Akira Sakurai,et al.  STUDY OF A MULTI-LAYERED THIN FILM HEAT TRANSFER GAUGE AND A NEW METHOD OF MEASURING HEAT TRANSFER RATE WITH IT. , 1987 .

[19]  T. Diller,et al.  Microsensors for high heat flux measurements , 1993 .

[20]  T. V. Jones,et al.  Liquid Crystal Techniques , 1994 .

[21]  Alan H. Epstein,et al.  High-frequency response heat-flux gauge , 1986 .

[22]  W. Cook,et al.  Reduction of data from thin-film heat-transfer gages - A concise numerical technique. , 1966 .

[23]  Rj Goldstein Rj.  Optical measurement of temperature , 1970 .

[24]  Thomas E. Diller,et al.  High-Frequency Heat Flux Sensor Calibration and Modeling , 1995 .

[25]  S. Gai,et al.  A method for the accurate determination of the thermal product (ρck)1/2 for thin film heat transfer or surface thermocouple gauges , 1988 .

[26]  F. Bayley.  An Analysis of Turbulent Free-convection Heat-transfer: , 1955 .

[27]  Michael G. Dunn,et al.  Investigation of the Heat-Island Effect for Heat-Flux Measurements in Short-Duration Facilities , 1997 .

[28]  W. Cook,et al.  Determination of heat-transfer rates from transient surface temperature measurements , 1970 .

[29]  T. V. Jones,et al.  Detailed measurements of heat transfer on and around a pedestal in fully developed passage flow , 1986 .

[30]  D. François,et al.  Thin film temperature heat fluxmeters , 1990 .