At the outset of the first period the requirements for the project and the components were established and the necessary functional and geometrical specifications were established. This led to the formation of numerous concept designs for the Surface Air Cooled Oil Cooler (SACOC) and it's mounting system, in addition the specifications informed the early concept studies for the Fan Outlet Guide Vane Coolers (FOGVCs). By the end of the first period Preliminary Design Reviews (PDRs) were held for the SACOC and Mounting System to down-select the concept to go forward to the detailed design phase. In addition to concept down-select there has been production of prototype components and some testing carried out to validate the computational modelling used to predict the performance of the coolers. Through the second period the concepts were further refined, a single concept for the SACOC was selected and developed to final design, as well as the mounting system. Some geometrical changes to the engine installation location led to a redesign in the mounting system, increasing the complexity by reducing the available space. A Critical Design Review (CDR) was conducted towards the end of period 2, following this further work has been conducted into the reaction of the cooler and mountings under loading. In Period 3, further analysis of the SACOC and Mounting system has been completed and the designs of the SACOC and mounting system have been finalised. Manufacture of the SACOC was launched in Period 3. Preliminary Design Reviews of both the FOHE and MOBV were completed in Period 3. Test standard SACOCs were manufactured in period 4 with testing planned to be complete in period 5.
Concepts have been generated and analysed for the FOGVCs and down-selected to a proposed component to manufacture to determine the feasibility of such a design, the validation testing will also validate some of the CFD modelling that has been conducted. In Period 3, a prototype FOGVC has been manufactured and instrumented ahead of wind tunnel testing planned in Period 4.
Specifications have been communicated in period 2 for the Fuel Oil Heat Exchanger (FOHE) and Modulating Oil Bypass Valve (MOBV) which will be studies as part of enhancements to the overall oil system. Some prototype parts have been manufactured in period 2 following communication of the specifications, with subsequent testing conducted to understand the current and potential capabilities of the components. Preliminary Design Reviews of both the FOHE and MOBV were completed in Period 3.This was followed by completion of the Critical Design Reviews for both units in period 4.
