Hello, A yearly allocation for the LCRC cluster has been requested with the following updated information: Submitter/PI: Lorenzo Bartolucci Project Name: GAS_injection Division: ES Project title: High-Pressure Gaseous Fuel Injection Research – in-nozzle flow and jet evolution Associated funding: Other Systems: Science: Current state of art of injection system provides several works about the in-nozzle analysis of liquid fuel injectors but a lack in knowledge is present in the gaseous fuel injector in-nozzle flow. The main goal of this project is to deeply understand the phenomenon occurring into the injector during the transients – both opening and closure – and how those are related with the following jet evolution, in order to obtain detailed information that can be used as input for ICE simulations. The analysis will be carried out in collaboration with the Argonne x-ray diagnostic group and the University of Rome Tor Vergata. Project description: This project focuses on investigating the in-nozzle flow for a gaseous inward opening injector and the consequently under-expanded jet evolution. This is aimed to provide a better comprehension of the local phenomenon and how those affect the typical behavior of the under-expanded gaseous jet (such as mach disk location and width, local thermo-fluid-dynamics properties and mixing with the surrounding mixture). At the current stage, the mesh influence on the quality of the numerical results has been deeply analyzed. An optimum mesh strategy and size have been found as a compromise between the numerical accuracy and the computational costs. The x-ray radiography data has been used as a reference for the comparison. Preliminary results have been obtained for the steady state simulation showing a good agreement with the experimental data. Currently an improvement in the agreement in terms of jet spread and mass distribution is under investigation. Future work would aim to represent also the opening and closing transient to provide a detailed instrument of analysis of the high injection phenomena occurring during these unsteady phases. Simulations will be performed with the commercial code CONVERGE and computational grids of the order of 15 millions of cells which will require the use of 64-144 cores depending on the specific case. The project has one member (barlo) working full-time on it, with 1-2 cases running regularly. With an average estimate of 96cores per run and 2 cases the expected amount of core-hrs needed for this project for each quarter is 96 cores x 24 hrs x 2 runs x 90 days = 414720. Considering some queue and post-processing time our request is for 1000000 hrs total, equally distributed for each quarter. Industry partnership: Project URL: Current FY Hours Used: undetermined amount New FY Requested allocation: 1000000 Q1: 250000 Q2: 250000 Q3: 250000 Q4: 250000 Justification: Recent scalability test (June 2016) performed on Blues provided following results: Simulation of gas jet from inward opening pintle. Mesh size = 15,000,000 cells 1 node (16 cores) – walltime = memory problems 2 nodes (32 cores) – walltime = 45min 15sec 100 % 3 nodes (48 cores) – walltime = 33min 18sec 90 % 6 nodes (96 cores) – walltime = 21min 50sec 70 % Storage requirements: Currently the project folder has 3TB size. I kindly ask to expand the project folder size to 4TB. Thank You, The LCRC Accounts System