Periodic Reporting for period 1 - InnoSTAT (Innovative STATOR)
Reporting period: 2019-10-01 to 2021-03-31
Therefore, the noise reduction measures for engine related noise from the intake, but also for rearward radiation is highly targeted by aircraft industry during the last 15 to 20 years. Most effort has been made in passive technologies for intake liner concepts, but also for the low noise design of fan and stator blades. From all the current available technologies a noise reduction related to engine sources by 6 dB can be expected, which is a big achievement, but still does not suffice to reach the goals. Thus, a further refinement of possible technologies has to be re-opened, like in the case of innovative stator technology. The proposed work of InnoSTAT consists in a systematic procedure, which has not been performed yet for considered OGV technologies. InnoSTAT will be the first project where the activities are focused on the above process with the only goal of bringing at least 3 OGV concepts to demonstrator level at TRL3 on full scale. This has not been achieved yet in any other programme for one OGV concept. The project’s objectives are
• to define 5 novel low noise stator concept designs, to develop and test them on prototype level TRL2 to TRL3,
• to select and develop 3 novel stator concepts for further advanced design, characterisation and full 3D stator stage large scale testing to TRL4,
• to define, design, and manufacture 2 demonstrator OGVs at TRL3 on full scale.
The project’s goal will be achieved in 3 major steps:
STEP1 - Testing and improving the technologies of 5 concepts on small scale prototype level.
STEP2 - Down selection of 3 technologies for further test on large scale, each as a fully equipped stator stage.
STEP3: Finally manufacturing 2 selected concept demonstrators and perform an integration study regarding engine environment.
This 48-months project with its ambitious goals will request 2,788 k€ in total. Its contribution to the noise reduction on ultra-advanced long-range and ultra-advanced short/medium range will be significant.
Another step forward was the detailed description of the technical requirements for the OGV prototypes to be designed in InnoSTAT. Specifications for the configurations to be studied in the small-scale (WP3) experimental campaign have been also provided. The full description of this information, important for the stator concept owners’ further work, is given in deliverable D1.1. The 5 OGV concepts were further described in the frame of WP2 where technical work was performed with respect to the low-noise OGV concepts’ development and description. A first preliminary review meeting (PDR) took place in M17 of the project, representing milestone MS2. All results were summarized a corresponding report, which will be the baseline for the upcoming Critical Design Review (CDR) in M19.
All performed work was supported by concept testing on laboratory level at the concepts owners’ facilities and by CFD simulations.
The impact from InnoSTAT will be generated by the actions, planned within the project. They will demonstrate - in a well quantified step-by-step process - the potential of establishing a technology for aircrafts’ noise reduction by providing concepts on demonstrator level, and setting the focus on novel aircraft propulsion systems, such as UHBR, that can make a significant contribution towards:
• Reduction of perceived noise by 65% in 2050 (baseline year 2000) and thus reducing the impact of Europe's air transport operations on the environment. Since aviation has a direct impact on the environment and over EU citizens’ health due to its emissions and noise to which the population is exposed.
• Production of competitive air vehicles by 2050. Aviation industry is crucial to the EU workforce (3 %) and European employment (3.7 million direct and indirect jobs). Noise is a clear metric for the competitiveness of a product. Creating an advantage in low noise technology like the innovative stator will be directly resulting in an advantage for the economy of the EU.
• The results of InnoSTAT will indirectly enabling a more ecologic and more economic turbofan engine, such as UHBR, which goes in line with acoustical shortcomings (e.g. shorter nacelle provides less space for acoustic lining, bigger fan diameter and slower rotation speed will yield low frequency noise effects, etc.).
InnoSTAT’s impact will also contribute - in this respect - to the retaining of natural resources and reducing the impact on climate by enabling novel aircraft engine architectures.