Lead Engineer

Timothy Juan

**** **** ******* #***, ******* Beach, CA 92660 614-***-**** adbrph@r.postjobfree.com

Objective

To seek a challenging and rewarding lead engineer role executing projects on vehicle aerodynamics, thermal management, aeroacoustics, fuel economy improvement, engine combustion and emission control, HVAC system, cabin climate control and thermal insulation technology where all heat transfer modes and transient mode are considered. Experienced Professional As

● Lead engineer and Technical Specialist experienced both in OEM and vendor side business, applying a variety of CAE/CFD tools on aerodynamic and thermal applications for automotive and aerospace product development, including complex nonlinear analysis, data correlation and visualization of physical phenomena of system or sub-system level products

● Principal analyst of powertrain cooling system, HVAC system, cabin climate control and insulation strategy of both commercial trucks and passenger cars, ensuring the performance quality, target schedule and supporting the release activities

● Product quality and cost control by ‘getting it right the first time’ and a root cause analysis throughout the life cycle of automotive products from the release to warranty claims

● Project manager of simulation driven design activities and virtual prototyping activities in cross-functional team environment using systems engineering and DFSS, leading off-shore team to meet target performance and schedule

● Go-to person as innovative problem solver and troubleshooter comfortable in handling unexpected situations complicated by uncertainties and ambiguities of issues at hand, identifying ‘good enough solutions’ whenever practical while enjoying and sharing ‘the pleasure of finding things out’ throughout the course Professional Experience

Kama Automotive LLC, CA (Technical Specialist): 1/2016 ~ Present Honda R&D Americas, OH (Sr. Engineer): 6/2011 ~ 11/2015 Navistar, Fort Wayne, IN (Sr. Technical Specialist): 10/2005 ~ 4/2011 Exa Corp., Burlington, MA (Manager, Chrysler and Ford as clients): 4/2002 ~ 3/2004 GM Tech Center, Warren, MI (Project Engineer as a contract): 4/1999 ~ 4/2002 CD-Adapco, Long Island, NY (Senior Engineer): 10/1997 ~ 4/1999 Renault-Samsung Motors Tech Center, Seoul (Assistant Manager): 4/1996 ~ 9/1997 Engine Research Center, Madison, WI (Research Assistant): 9/1994 ~ 2/1996 Korea Aerospace Research Institute (Research Engineer): 3/1991 ~ 8/1993 Education

M.S. in Mechanical Engineering (University of Wisconsin in Madison, WI): 12/1995 Army officer, 2nd Lieutenant (Korea Third Military Academy): 2/1991 M.S. in Aerospace Engineering (Seoul National University, Korea): 2/1990 B.S. in Aerospace Engineering (Seoul National University, Korea): 2/1988 Project Highlights and Accomplishments

Vehicle Aerodynamics:

● Lead and manage Vehicle Aerodynamics activities and personnel: CFD and Wind Tunnel Test (Karma)

● Development of algorithm-driven vehicle shape optimization method for best-in-class drag and range (Karma)

● Automated vehicle aerodynamics simulation process development for speed and accuracy (Karma)

● Multi-phase flow simulation for ADAS sensor protection and vehicle safety (Karma)

● Vehicle wind noise reduction using transient aeroacoustics CFD analysis

● Shape optimization of passenger Car (GM, Ford), SUV (Chrysler), Tractor-Trailer, Bus (Navistar) for improved fuel economy using PowerFlow and Fluent in close cooperation with design studio

● Evaluation of aerodynamic add-on devices for drag reduction of Class 8 vehicle (Navistar)

● Study of wind loading impact on premature tire wear of Class 8 vehicle using CFD (Navistar)

● Shock capturing method for blunt body in compressible, supersonic flow using adaptive mesh: Master’s thesis (SNU)

● Wind tunnel testing of full-scale tractor-trailers (Navistar at NRC, Canada), passenger cars (GM), unmanned aerial vehicle (SNU), scale model test (Navistar using Texas A&M wind tunnel)

● Root cause analysis and mitigation of side window rain contamination through air flow management (Navistar)

● Customized virtual wind tunnel design for quick evaluation of vehicle aero drag at different yaw angles (Navistar)

● Identification of the optimal air intake and remote condenser location for truck and bus (Navistar)

● Development of low backpressure, low turbulence air induction system to ensure accurate MAF sensor reading

(Navistar)

● Root cause analysis of windshield icing of long-haul trucks at highway speed under severe winter weather condition: Identified the root causes and provided cost-effective solutions Vehicle Thermal Management:

● Full Vehicle Underhood Thermal Management: CFD and correlation activity with test (Karma)

● Underhood/underbody thermal management CAE lead of a hybrid sports car development from the concept to the final development stage (Honda R&D, Published in SAE paper in 2015)

● Underhood/underbody thermal management CAE lead of a luxury sedan development (Honda R&D)

● Underhood/underbody thermal management CAE lead of a luxury SUV development (Honda R&D)

● Underhood/underbody thermal management CAE lead of a minivan development (Honda R&D)

● Vehicle cooling module optimization for reduced fan-on time and improved fuel economy

(Navistar, Published in SAE paper in 2008)

● Engine water jacket coolant flow optimization through variation of gasket hole placement and re-sizing (CD-Adapco)

● Surge tank shape optimization for improved deaeration performance (Navistar)

● Insulation choice study to meet performance and cost target: Recommendation implemented to production vehicles

(Navistar)

● Root cause analysis of faulty air induction system with loosened tubes at connecting joints using Radtherm (Navistar) HVAC/Cabin Climate Control/Human Thermal Comfort:

● Windshield and side window defrosting pattern/time prediction and performance improvement to meet SAE standard

(Navistar): Turned an underperforming design into the target design using CFD by reducing the defrosting time by 15 minutes

● Sleeper cab micro-climate evaluation and optimization in the presence of upper bunk vents and prediction of thermal comfort for occupants using Fanger model (Navistar): Proposed a design that meets thermal comfort level based on Fanger model and Berkeley model

● Publication of cabin insulation strategy to reduce cost, condensation and engine idle time: Facilitated release engineer readiness in dealing with insulation product suppliers (Navistar)

● Root cause analysis of windshield icing of long-haul trucks at highway speed under severe winter weather condition: Identified the root causes and provided cost-effective solutions Emission Control System:

● Aftertreatment system development: Temperature Control Device (TCD) for hot exhaust gas during DPF regeneration for heavy and medium duty vehicles (Navistar, US patents issued, SAE paper published, Device installed on most North American products)

● Development of cost-reduced version of TCD (installed on 2010 and beyond model years)

● Gas mixing performance improvement: Exhaust NOx reduction using gasified urea injection (Navistar)

● Improvement of mixing index of liquefied urea of SCR using a new low back pressure, high swirl mixer (Navistar in cooperation with Mahindra off-shore engineering team) Diesel Engine Combustion Analysis:

● Assessment of spray combustion models in KIVA-II for small DI Diesel engines (ERC)

● Investigation of combustion characteristics (Power density, Soot, NOx) in DI Diesel engine with variable tilt angle injector using KIVA (ERC)

Advanced simulation techniques and benchmark activities:

● Experienced in complex geometry, complex physics problems or problems dealing with both

● Can design and execute the optimized simulation strategies on case by case basis or train others to do so

● Transient solar loading on sleeper cab to find sensitivity of cabin air temperature to cab paint colors (Navistar)

● Transient and multi-phase thermal flow analysis for windshield defrosting performance target (Navistar)

● Moving mesh analysis to observe painting defect due to cavitation during E-coating process of cab-in-white (Navistar)

● Transient and multi-phase flow analysis to predict and manage cab interior condensation flow pattern (Navistar)

● Fluid-structure interaction analysis for active air flow control device (Navistar)

● Development of best practices and process improvement for CFD modeling of thermal and aerodynamic applications

(Navistar)

● Development of adaptive grid algorithm for shock wave capturing of blunt body at supersonic speed (SNU)

● Flow visualization using computer animation

● Performance benchmark between FLUENT and Star-ccm+ (Honda R&D)

● Performance benchmark between FLUENT and PowerFLOW (Exa)

● Performance benchmark of FLUENT, STAR-CD, FIRE for software purchase decision (Renault-Samsung)

● Introduction of CFD procedure in vehicle development to company engineering process (Renault-Samsung) Core Skills

● Computational Fluid Dynamics for vehicle aerodynamics

● Wind tunnel test planning and execution both for full and reduced scale wind tunnel

● Underhood/underbody thermal management CAE using computational models

● Powertrain cooling module optimization to reduce fan-on time and improve fuel economy

● HVAC system analysis and optimization to improve volume flow, noise emission and fuel economy

● Cabin climate control and defrosting analysis for improved human comfort and safety

● Aftertreatment system analysis and design optimization for low emission (NOx, Soot, DPM)

● Heat transfer analysis of underhood, underbody thermal components to sustain parts integrity

● Diesel engine combustion analysis for reduced emission and improved fuel economy

● Project management of a new vehicle program coordinating testing resources/activities for the project team

● CAE software: FLUENT, RadTherm, Star-ccm+, PowerFLOW, TGrid, ANSA, HyperMesh, EnSight

● Office software: MS-Word, Excel, PowerPoint; OS: Window, Unix/Linux

● UNIX programming, Java script programming, Fortran programming, MINITAB

● CAE/CFD training, mentoring

● Advanced driver’s license from GM Proving Ground in Arizona Granted Patents

- US Patent (Lead inventor): Exhaust temperature reduction device for aftertreatment, 2009-12-08

- US Patent (Lead inventor): Air intake plenum for air induction channel, 2011-04-27

- US Patent (Co-inventor): Micro-venturi exhaust cooling device, 2007-10-25 Publications and Presentations

- SAE paper (Co-author): Thermal and Aerodynamic Development of a Cooling and Heat resistance Package for a New Hybrid Sports Car, 2015-4-15

- SAE paper (Lead author, Presenter): Compact Post-Aftertreatment Temperature Control Device, 2007-10-26

- SAE paper (Lead author, Presenter): Investigation and Assessment of Factors Affecting the Underhood cooling air flow using CFD, 2008-10-07

- SAE conference oral presentation: Overview of today’s exhaust temperature control devices, 2009-09-27

- Magazine article (Off-Highway Engineering): Aftertreatment temperature control, 2008-09-01

- Invited speaker at Fluent user group meeting, 2007 Languages

- English, Korean (Fluent)

- German, Japanese (Moderate)

- Chinese (Limited)

For images of my work samples, please visit:

https://www.linkedin.com/in/timothy-juan-60853333/?msgConversationId=6593728346612473856&msgOverlay=true

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