Numerical Methods to Determine Convective Heating Rates on Aerodynamic Surfaces

Kawale, Bharat; Peetala, Ravi K.; Sahoo, Niranjan; Kulkarni, Vinayak

doi:10.1260/1759-3107.1.1.1

Cited by 1 publication

(2 citation statements)

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“…The most widely used discretization technique is the cubic spline technique. More details about this technique are given in references [21][22][23][24]. The heat flux recovered using this technique is given in Fig.…”

Section: Prediction Of Heat Fluxmentioning

confidence: 99%

“…These calibration constants are useful for recovery of local surface heat flux histories from the recorded temperature signals [18][19][20]. In this phase, an appropriate analytical technique such as one-dimensional heat conduction in semiinfinite solid is generally employed for prediction of time varying surface heat flux [21][22][23][24][25]. Though TFHFSs are most preferred sensors, there is still scope to improve their ability to predict low magnitude heat flux accurately if the sensitivity of these sensors is further increased through the use of nano materials.…”

Section: Introductionmentioning

confidence: 99%

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Multi-walled carbon nano-tubes for performance enhancement of thin film heat flux sensors

2019

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Surface heat transfer measurement is an important aspect in many research problems. Thin film heat flux sensor (TFHFS) is mostly considered in such situations for heat flux measurement due to its quick response and high accuracy. In the present studies, multi-walled carbon nanotubes (MWCNTs) are mixed with platinum while making the TFHFSs. Such addition is noticed to increase the sensitivity and decrease the temperature coefficient of resistance (TCR) of the thin film sensors. Improved sensitivity by 151% and 119% for Macor and Quartz sensors has led to increase in strength of the temperature response of the sensors during dynamic calibration experiments. Though heat flux recovery is seen to have encouraging agreement for all the sensors, sensitivity enhancement is noticed to be more prominent and advantageous for Macor based sensors. Present studies recommend adequately finished substrate for better adhesion. Further, use of MWCNTs is advisable especially for low heat flux measurement and also for Macor substrate since either situation demands the higher sensitivity to increase the output response.

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Section: Prediction Of Heat Fluxmentioning

confidence: 99%