The feasibility of the parameter estimation on the basis of the ensemble Kalman filter (EnKF) for a practical simulation involving model errors was investigated. The three-dimensional flow and thermal simulations for the engine compartment of a test excavator were simulated, and several unknown temperatures used for boundary conditions were estimated with the method. The estimation method was validated in two steps. First, the estimation method was tested with the influence of the model errors removed by virtually creating true values with a simulation. These results showed that the proposed parameter-estimation method can successfully estimate surface temperatures. They also suggested that the appropriate ensemble size can be evaluated from the number of unknown parameters. Second, the estimation method was tested under a practical condition including model errors by using actual measurement data. Model errors were statistically estimated using prior obtained error data concerning other design configurations, and they were added to the observation error in the EnKF. These results showed that taking model errors into account in the EnKF provides more-accurate parameter-estimation results. Moreover, the uncertainty of an estimated parameter can be evaluated with the standard deviation of its distribution.
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December 2018
This article was originally published in
Journal of Heat Transfer
Research-Article
A Parameter-Estimation Method Using the Ensemble Kalman Filter for Flow and Thermal Simulation in an Engine Compartment
Kazuya Kusano,
Kazuya Kusano
Hitachi, Ltd.,
Research & Development Group,
832-2, Horiguchi,
Hitachinaka 312-0034, Ibaraki, Japan
Research & Development Group,
832-2, Horiguchi,
Hitachinaka 312-0034, Ibaraki, Japan
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Hironobu Yamakawa,
Hironobu Yamakawa
Hitachi, Ltd.,
Research & Development Group,
832-2, Horiguchi,
Hitachinaka 312-0034, Ibaraki, Japan
Research & Development Group,
832-2, Horiguchi,
Hitachinaka 312-0034, Ibaraki, Japan
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Kenich Hano
Kenich Hano
Hitachi Construction Machinery Co., Ltd.,
650, Kandatsu,
Tsuchiura 300-0013, Ibaraki, Japan
650, Kandatsu,
Tsuchiura 300-0013, Ibaraki, Japan
Search for other works by this author on:
Kazuya Kusano
Hitachi, Ltd.,
Research & Development Group,
832-2, Horiguchi,
Hitachinaka 312-0034, Ibaraki, Japan
Research & Development Group,
832-2, Horiguchi,
Hitachinaka 312-0034, Ibaraki, Japan
Hironobu Yamakawa
Hitachi, Ltd.,
Research & Development Group,
832-2, Horiguchi,
Hitachinaka 312-0034, Ibaraki, Japan
Research & Development Group,
832-2, Horiguchi,
Hitachinaka 312-0034, Ibaraki, Japan
Kenich Hano
Hitachi Construction Machinery Co., Ltd.,
650, Kandatsu,
Tsuchiura 300-0013, Ibaraki, Japan
650, Kandatsu,
Tsuchiura 300-0013, Ibaraki, Japan
1Corresponding author.
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received April 23, 2018; final manuscript received July 30, 2018; published online September 5, 2018. Assoc. Editor: Sara Rainieri.
J. Heat Transfer. Dec 2018, 140(12): 122801 (8 pages)
Published Online: September 5, 2018
Article history
Received:
April 23, 2018
Revised:
July 30, 2018
Citation
Kusano, K., Yamakawa, H., and Hano, K. (September 5, 2018). "A Parameter-Estimation Method Using the Ensemble Kalman Filter for Flow and Thermal Simulation in an Engine Compartment." ASME. J. Heat Transfer. December 2018; 140(12): 122801. https://doi.org/10.1115/1.4041188
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