Mechanical Engineer

Orlando G. Rivera González

Email: *******.********@***.*** RR#2 Box 5900, Toa Alta, P.R 00953 Mobile: 787-***-**** EDUCATION: University of Puerto Rico, Mayagüez Campus (UPRM) Graduation date: December 2020 Bachelor of Science: Mechanical Engineering GPA: 3.85/4.00 Security Clearance: Secret

Relevant courses: • Thermo-fluids Systems design • Fluid Mechanics • Heat Transfer WORK EXPERIENCE:

The Boeing Company, Houston, TX- ISS Loads and Dynamics Intern June 2020 –Present

• Created a Finite Element Model (FEM) and a surface model of the International Space Station (ISS) with a cargo module attached (Cygnus) to SSRMS

(Space Station Remote Manipulator System) and used MSC/NASTRAN to calculate important system parameters like Eigen Values and mode shapes.

• Validated position of Cygnus FEM and geometric surface model in MSC/Patran at different SSRMS orientations.

• Conducted plume impingement analysis of incoming vehicles on the ISS surface Model to verify that the induced loads on Cygnus solar arrays are not exceeding maximum values (Soyuz, CST-100 and Crew Dragon proximity operations).

• Processed Jet Firing History data for CST-100 maneuvers (dock/undock, breakout, retreat, etc.), performed sanity checks on the incoming data.

• Determined the maximum induced loads for each of the 700,000+ possible rotational angle scenarios of the Solar Arrays in the ISS caused by the plume of the CST-100 thrusters during proximity operations. GE Hitachi Nuclear Energy, Wilmington, NC- Thermal Hydraulic Mechanical System Design Intern August 2019 –December 2019

• Determined the Thermo-Hydraulic performance (Maximum fluid velocity, Total Heat Transferred, Mass Flow, etc.) of the Auxiliary Cooling System

(ACS) of the Versatile Test Reactor (VTR) a Liquid Metal Fast Reactor using a solver code based in MATLAB.

• Updated the solver code for the Auxiliary Cooling System of VTR using the base code from a former reactor design.

• Calculated Flow-Area geometry, lengths and total pressure loss of complete flow path of the ACS in VTR. Integrated this data in the solver code using MATLAB.

• Incorporated an option in the solver code to model the added Heat Transfer benefit of implementing fins or ribs in the heated surface of the Containment Vessel of the reactor.

• Improved program accuracy by 5% through implementation of heat transfer effect of Gas Natural Convection of the Containment Vessel’s exterior walls to the solver code.

• Discovered a pinch point (contraction) in the flow path of the ACS that hindered the heat transfer performance, determined the optimum distance for minimal pressure loss in the segment and changed the geometric parameter resulting in a 15% heat transferred increased.

• Modeled individual parts of the nuclear reactor Auxiliary Cooling System using ANSYS FLUENT to validate results from the Solver Code.

• Created a 3D CAD of the flow path of the ACS using INVENTOR with the purpose of performing CFD in critical sections in the system.

• Improved the run time of the program by 30%, by changing the input method of the code from .xls to .mat.

• Documented all the improvements and changes that were implemented in the Solver Code; created a User Manual for ease of usability. The Boeing Company, Huntsville, A.L- EAHI (Engineering Accelerated Hiring Initiative) Intern May 2019 –August 2019

• Modified and created Manufacturing Plans and Bill of materials (BOM) from 5 production projects.

• Evaluated cable and mechanical designs to streamline the manufacturing plans with accurate and optimal processes for the shop floor.

• Designed and implemented accurate work plans based on multiple production and quality constraints.

• Created and improved 150 plans within projects like SLS (Space Launch System), defense airplanes, and defense missile initiatives.

• Supported the Center of Excellence to determine the pass rate of the MDA (Manufacturing Defect Analyzer) test machine that oversees all the circuit boards at this location, with the intent of providing feasible data to determine the main cause of failures within the family of missile defense circuit boards.

Pratt and Whitney, West Palm Beach, FL- Structures Intern June 2018 –August 2018

• Developed digital Goodman and Campbell diagrams based on engine test data for Quality Nonconformance disposition, a required criteria for evaluation of the High Pressure Compressor Blades of the Jet Engines.

• Located the maximum Stress values for additional frequency resonance points not previously documented for over 15 vibrational deformation modes using structural analysis programs like ANSYS.

• Established the Goodman and Campbell diagram of 12 engine stages with the additional Vibratory modes that will be used to evaluate the disposition of the Quality Nonconformance Blades.

Formula SAE Collegiate Design Series UPRM - Powertrain Engineer February 2018 – January 2020

• Designed an exhaust silencer in Siemens NX for the Formula vehicle to increase in insertion loss in the device, at idle and at max RPM (12,400rpm), using the quarter wave and absorption methods.

• Performed Harmonic Acoustic and Computational Fluid Dynamics analysis using ANSYS Mechanical and STAR CCM+, to determine the expected insertion loss and power losses at the engine that the silencer will create.

• Determined the total heat transferred of the cooling system of the vehicle utilizing test data coupled with the ε-NTU method.

• Improved air volumetric/mass flow results accuracy of the radiator cooling system by 20% by performing detailed pressure loss calculations and a 3D CFD model of the cooling system using STAR CCM+.

• Selected a Fan for the cooling system utilizing the data acquired from the fluid analysis considering pressure fan curve and static pressure coupled with the required air volumetric flowrate.

HONORS/AWARDS:

• Honor tuition exemption Grant UPRM (2016-2020): Given to the students with top 5% GPA of the department.

• One-year early admission to college Puerto Rico’s Department of Education (2015): One of the 5 chosen students out of 100, based on College Board Exam scores and a 3.75+ GPA.

TECHNICAL/NON-TECHNICAL SKILLS:

• Proficient in NX, INVENTOR, PTC (Creo Parametric), MATLAB, Microsoft Office, ANSYS Fluent, Ricardo (Wave, Vectis), STAR CCM+, NASTRAN and UNIX OS.

• Fluent (Spanish & English)

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