The article discusses how Siemens Digital Industries Software's Simcenter™ software is aiding aerospace engineering organizations in optimizing aircraft performance for green aviation. By utilizing digital twin technology, these organizations can conduct virtual and physical testing across various system domains such as fluid dynamics, thermal properties, and mechanical aspects impacted by the shift towards sustainable aviation. The white paper presented in the content examines the specific challenges faced by aerospace engineers in designing sustainable aircraft and delves into the potential of hydrogen-powered propulsion systems, including jet engines and fuel cell technology, in driving forward next-generation aircraft. The focus is on the need to reimagine aircraft configurations to fully embrace the benefits of green aviation and mitigate environmental consequences. The overall sentiment of the article is positive, emphasizing the importance of leveraging innovative technologies to achieve sustainable flight in the aerospace industry.