Juan José Cruz, PhD

Research Interests

The research interests include fluid dynamics in reactive and inert flow, experimental non-intrusive diagnostics, heat and mass transfer, energy conversion, combustion, thermal radiation and soot production/mitigation.

Vita

From 2021 Dr. Juan José Cruz is researcher at Departamento de Industrias, Universidad Técnica Federico Santa María, Chile. Originally from Trujillo, Perú, he graduated with a Mechanical Engineering from the Universidad Nacional de Trujillo, Perú. Subsequently, work overseeing maintenance plans in fishing and underground mining industries. He earned his Msc and PhD in Thermal Sciences and Combustion at Pontifical Catholic University of Rio de Janeiro (PUC-Rio), Brazil. He also worked (2014-2017) as an Assistant Research at the Laboratory of Combustion and Turbulence at PUC-Rio. His academic career has focused on the development and application of advanced optical techniques in the field of Fluid Mechanics, Heat Transfer, and Combustion. His expertise encompasses a variety of cutting-edge techniques, including Particle Image Velocimetry (PIV), Shadowgraphy, Laser-Induced Fluorescence (LIF), Laser-Induced Incandescence (LII), Laser Extinction (LE), Tunable Diode Laser Absorption Spectroscopy (TDLAS), Optical Pyrometry, among others.

Publications

(24) Rosati, V; Cruz, JJ, Escudero, F; Et al., Soot properties characterization of aviation Jet A-1 laminar non- premixed coflow flame, Exp. Therm. Fluid Sci., 151(2023).

(23) Thomsen, M; Cruz, J J; Escudero, F; Et al., Sooting behavior on a spreading flame over PMMA rods under different oxygen concentrations, Fire Saf. J, 141(2023).

(22) Pinto, P; Littin, M; Rivera, J I; Severino, G; Cruz, J J; Et al., A simpler tractable contour technique to model thermal radiation from buoyant diffusion flames, Exp. Therm. Fluid Sci., 149(2023).

(21) Portilla, J; Cruz, J J; Escudero, F; Et al., Towards low-cost soot pyrometry in laminar flames using broadband emission measurements and Artificial Neural Networks, J. Energy Inst., 109(2023).

(20) Cruz, J J; Escudero, F; Verdugo, I; Et al., Sooting propensity and maturity of gasoline/anisole blends in a laminar coflow diffusion flame, Fuel, 345(2023).

(19) Escudero, F; Cruz, J J; Verdugo, I; Et al., Effect of maturity on soot volume fraction measurements using the AC-LII technique in a laminar coflow ethylene diffusion flame, Proc. Combust. Inst., (2022).

(18) Thomsen, M; Cruz, J J; Escudero, F; Et al., Determining flame temperature by broadband two color pyrometry in a flame spreading over a thin solid in microgravity, Proc. Combust. Inst., (2022).

(17) Escudero, F; Demarco, R; Cruz, J J; Verdugo, I; Carvajal, G; Et al., Determining spatially-resolved thermal radiation from non-intrusive measurements of soot properties, Appl. Therm. Eng., 215(2022).

(16) Escudero, F; Cruz, J J; Liu, F, Fuentes, A; A layer-peeling method for signal trapping correction in planar LII measurements of statistically steady flames, Meas. Sci. Technol. 33(2022)015205.

(15) Cruz, J J; Verdugo, I; Gutiérrez-Cáceres, N; Escudero, F; Et al., Soot Volume Fraction Measurements by Auto-Compensating Laser-Induced Incandescence in Diffusion Flames Generated by Ethylene Pool Fire, Front. Mech. Eng., 7(2021)744283.

(14) Cepeda, F; Demarco, R; Escudero, F; Cruz, J J; Carvajal, G; Fuentes, A; Influence of the Oxygen Index on Acoustically Forced Laminar Ethylene Non-premixed Flames, Combust. Flame., 236(2021).

(13) Cruz, J J; Escudero, F; Álvarez, E; Et al., Three-wavelength broadband soot pyrometry technique for axisymmetric flames. Opt. Lett., 46(2021).

(12) Rodríguez, A; Portilla, J; Cruz, J J; Et al., Improving Broadband Emission-Based Soot Pyrometry Using Convolutional Neural Networks. IEEE Instrumentation and Measurement Technology Conference., 0(2021).

(11) Yon J; Cruz, J J; Escudero, F; Liu, F; Fuentes, A, Revealing soot maturity based on multi-wavelength absorption/emission measurements in laminar axisymmetric coflow ethylene diffusion flames. Combust. Flame., 227(2021).

(10) Escudero F; Cruz, J J; Liu, F; Fuentes, A, Correction of laser-induced incandescence signal trapping in soot measurement in a microgravity boundary layer laminar diffusion flame. Proc. Combust. Inst., 38(2021).

(9) Rodríguez, A; Escudero, F; Cruz, J J; Et al., Retrieving soot volume fraction fields for laminar axisymmetric diffusion flames using convolutional neural networks, Fuel, 285(2020).

(8) Pinto, P; Cabrera, A; Cruz, J J; Contreras, J; Et al., Effects of wildland fuel moisture content on radiant heat flux emitted by a laminar non-premixed flame. Appl. Therm. Eng., 181(2020).

(7) Cruz, J J; Figueira da Silva, L F; Escudero, F; Et al., Soot pyrometry by emission measurements at different wavelengths in laminar axisymmetric flames. Combust. Sci. Technol., (2020).

(6)  Verdugo, I; Cruz, J J; Álvarez, E; Et Al., Candle flame soot sizing by planar time-resolved laser-induced incandescence. Scientific Reports 10, 11364(2020).

(5) Severino, G; Cabrera, A; Contreras, J; Pinto, P; Cruz, J J; Fuentes, A; A new burner to characterize laminar diffusion flames generated from wildland fuels. Fire Saf. J., 114(2020).

(4) Reszka, P.; Cruz, J J; Valdivia, J; Et al., Ignition delay times of live and dead Pinus Radiata needles. Fire Saf. J., 112(2020).

(3)  Patiño, F; Cruz, J J; Verdugo, I.; Et al., Soot primary particle sizing in a n-heptane laminar co-flow diffusion flame by planar two-color TiRe-LII and TEM images analysis. Fuel, 226(2020).

(2) Jerez, A; Cruz, J J; Figueira da Silva, L F; Demarco, R; Fuentes, A; A comparison of measured and modeled PAH soot precursors in co-flow ethylene/air laminar diffusion flames. Fuel, 23(2019).

(1) Cruz, J J; Figueira da Silva, L F. Study of the turbulent velocity field in the near wake of a bluff body. Flow, Turbulence and Combustion, 97(2016).

Conferences, Lectures, Symposia and Workshops

(9) Scouflaire, P; Cruz, J J; Verdugo, I; et al, Sooting behavior in a turbulent ethylene premixed swirl flame, 15th International Conference on Combustion Technologies for a Clean Environment, Lisboa, Portugal, Jun 25-29, 2023.

(8) Castro, V; Cruz, J J; Demarco, R; et al, Dynamic range gate of TiRe-LII measurements for soot temperature, 12th Mediterranean Combustion Symposium, Luxor, Egipto, Jan 23-26, 2023.

(7) Barrera, C; Castro, V; Escudero, F; Cruz, J J; Verdugo, I; et al, Anisole maturity characterization in a laminar co-flow diffusion flame, 12th Mediterranean Combustion Symposium, Luxor, Egipto, Jan 23-26, 2023.

(6) Pinto, P; Littin, M; Rivera, J I; Severino, G; Cruz, J J; Fuentes, A; A simpler tractable contour technique to model thermal radiation from buoyant diffusion flames, 12th Mediterranean Combustion Symposium, Luxor, Egipto, Jan 23-26, 2023.

(5) Rosati, V; Cruz, J J; Escudero, F; Barrera, C; Cheng, D; Fuentes, A; Soot properties characterization of aviation jet a-1 laminar non-premixed co-flow flame, 12th Mediterranean Combustion Symposium, Luxor, Egipto, Jan 23-26, 2023.

(4) Thomsen, M; Cruz, J J; Escudero, F; et al, Determining flame temperature by broadband two-color pyrometry in a flame spreading over a thin solid in microgravity, 39th International Symposium on Combustion, Vancouver, Canada, Jul 24-29, 2022

(3) Escudero F; Cruz, J J; Liu, F; Fuentes, A, Correction of laser-induced incandescence signal trapping in soot measurement in a micro-gravity boundary layer laminar diffusion flame, 38th International Symposium on Combustion, Adelaide (virtual), Australia, Jan 24-29, 2021.

(2) Rezka, P.; Cruz, J J; Valdivia, J; et al; Ignition delay times of live and dead Pinus radiata needles, 11th Mediterranean Combustion Symposium, Tenerife, España, Jun 16-20, 2019.

(1) Patiño, F; Cruz, J J; Verdugo, I.; et al.; Soot primary particle sizing in an n-heptane laminar co-flow diffusion flame by planar two-color tire-lii and TEM images analysis, 11th Mediterranean Combustion Symposium, Tenerife, España, Jun 16-20, 2019.

Research projects

(6) Evolution of Soot Properties in Non-Premixed Flames of Fossil Fuels and Biofuels, 2022-2023, USM-DGIIE.

(5) Revealing Soot Chemistry Evolution in the Combustion of Biofuels for Jet Applications, 2020-2023, ANID PCI #190009.

(4) Characterization of soot production in diesel surrogates flames under acoustic disturbance at different oxygen indices, 2019-2022, FONDECYT #3190860

(3) Understanding Wildfire Hazards Posed by Ignition in Continuous and Discontinuous Configurations, 2018-2019, ANID ACT172095

(2) Development of a combustion modeling in turbulent flow based on Eulerian/Lagrangian technique, 2014-2018, PETROBRAS #050.0080122.12.9

(1) Experimental study of combustion in turbulent flow of air and ethanol, 2011-2013, CAPES, PUC-Rio and USP.

Other Scholarly Output

(2) An experimental study of aromatic precursors and soot distribution for a laminar ethylene coflow diffusion flame, PhD Thesis, Pontifical Catholic University of Rio de Janeiro, 2013.

(1) Experimental study of the turbulent combustion of ethanol sprays using OH-PLIF, PIV and Shadowg- raphy, MSc Thesis, Pontifical Catholic University of Rio de Janeiro, 2013.