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- W1750429940 abstract "In this paper, we investigate the effect of a periodic perturbation of total pressure drop on density wave oscillations (DWOs) in a boiling channel (BC). The focus is on the nonlinear dynamics and control of the DWO at low forcing frequencies ff+ for a range of inlet subcooling number Nsub. At a relatively high Nsub, the system exhibits frequency entrainment. Relying on the harmonic balance applied to the linearized model for DWOs, semi-analytical solutions can successfully explain the numerically-detected harmonic entrainment. The effect of ff+ and Nsub on the periodically-perturbed DWOs has been studied. We also propose a nonlinear model predictive controller (NMPC) to control the periodically-forced DWOs. The performance of NMPC was found to be improving on increasing Nsub and on decreasing ff+ in 0≤ff+<2fn+ (fn+ is natural frequency), except the regions of entrainment. Both the numerical simulations and the semi-analytical solutions consistently predict the control effort that also varies with ff+ and Nsub." @default.
- W1750429940 created "2016-06-24" @default.
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- W1750429940 date "2016-02-01" @default.
- W1750429940 modified "2023-09-24" @default.
- W1750429940 title "Periodically-forced density wave oscillations in boiling flow at low forcing frequencies: Nonlinear dynamics and control issues" @default.
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- W1750429940 doi "https://doi.org/10.1016/j.ces.2015.09.037" @default.
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