Dipasquale, Daniele

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Dipasquale, Daniele
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Dipasquale, D.
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daniele.di@kmitl.ac.th

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    Investigation of cooling performances of a non-film-cooled turbine vane coated with a thermal barrier coating using conjugate heat transfer
    (2018-04-01)
    Prapamonthon, Prasert
    ;
    Yooyen, Soemsak
    ;
    Sleesongsom, Suwin
    ;
    Dipasquale, Daniele
    ;
    Xu, Huazhao
    The aim of this paper is to numerically investigate cooling performances of a non-film-cooled turbine vane coated with a thermal barrier coating (TBC) at two turbulence intensities (Tu = 8.3% and 16.6%). Computational fluid dynamics (CFD) with conjugate heat transfer (CHT) analysis is used to predict the surface heat transfer coefficient, overall and TBC effectiveness, as well as internal and average temperatures under a condition of a NASA report provided by Hylton et al. [NASA CR-168015]. The following interesting phenomena are observed: (1) At each Tu, the TBC slightly dampens the heat transfer coefficient in general, and results in the quantitative increment of overall cooling effectiveness about 16-20%, but about 8% at the trailing edge (TE). (2) The protective ability of the TBC increases with Tu in many regions, that is, the leading edge (LE) and its neighborhoods on the suction side (SS), as well as the region from the LE to the front of the TE on the pressure side (PS), because the TBC causes the lower enhancement of the heat transfer coefficient in general at the higher Tu. (3) Considering the internal and average temperatures of the vane coated with two different TBCs, although the vane with the lower thermal conductivity protects more effectively, its role in the TE region reduces more significantly. (4) For both TBCs, the increment of Tu has a relatively small effect on the reduction of the average temperature of the vane.
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    Optical performance evaluation of the high spatial resolution imaging camera of BepiColombo space mission
    (2021-09-01)
    Dipasquale, Daniele
    ;
    Debei, Stefano
    ;
    Cremonese, Gabriele
    ;
    Capaccioni, Fabrizio
    ;
    Palumbo, Pasquale
    Thermo-elastic analyses of the High spatial Resolution Imaging Camera (HRIC), which is mounted on Mercury Planetary Orbiter BepiColombo Integrated Observatory SYStem suit (SIMBIO-SYS) of BepiColombo space mission, are carried out in order to evaluate the effect of thermo-elastic deformations on the optical performance experienced by the camera at the worst thermal scenario of Mercury space environment. In particular, the optical performance is evaluated in terms of the pointing error of the camera and the potential presence of optical aberrations.
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    A Stress Tensor-based Failure Criterion for Ordinary State-based Peridynamic Models
    (2022-01-01)
    Dipasquale, Daniele
    ;
    Sarego, Giulia
    ;
    Prapamonthon, Prasert
    ;
    Yooyen, Soemsak
    ;
    Shojaei, Arman
    Peridynamics is a recent nonlocal theory of continuum mechanics that is suitable to describe fracture problems in solid mechanics. In this paper, a new failure criterion based on the stress field is developed by adopting the damage correspondence model in the ordinary state-based peridynamic theory. The proposed stress tensor-based failure criterion is capable of predicting more accurately crack propagation in the mixed mode I-II fracture problems different from other failure criteria in peridynamics. The effectiveness of the proposed model is demonstrated by performing several examples of mixed-mode dynamic fracture in brittle materials.