Eiji Shima

Title: Eiji Shima: Innovator in Jet Noise Modeling and Aircraft Design

Introduction

Eiji Shima is a notable inventor based in Kakamigahara, Japan. He has made significant contributions to the fields of jet noise modeling and aircraft design. With a total of three patents to his name, Shima's work focuses on enhancing the understanding and management of jet noise, which is crucial for the aviation industry.

Latest Patents

Shima's latest patents include a jet noise modeling method, a jet noise analyzing method, and an aircraft designing method. The jet noise source modeling method involves creating a model by setting multiple point sound sources based on the strength distribution of a jet noise source. This is determined through an analysis of a jet stream. The method also includes determining the sound source strengths and phases of these point sound sources based on known noise levels in a far free sound field related to the jet stream. Additionally, he has designed an aircraft with an airframe capable of insulating the interior from external noises based on the analysis results.

Another significant patent is the grid convergence solution computation system. This system computes a high-order accuracy computed value using a single grid and a low-order accuracy computed value using the same grid. It establishes a grid convergence solution based on the relationship between these computed values, assuming that this relationship remains constant regardless of the grid's fineness or coarseness. This innovative system allows for highly accurate grid convergence solutions with minimal computational complexity.

Career Highlights

Eiji Shima has worked with prominent companies such as Kawasaki Heavy Industries and the Advanced Technology Institute of Commuter Helicopter, Ltd. His experience in these organizations has contributed to his expertise in aircraft design and noise management.

Collaborations

Shima has collaborated with notable coworkers, including Eiichi Yamakawa and Noboru Kobiki. Their collective efforts have further advanced the field of aviation technology.

Conclusion

Eiji Shima's innovative work in jet noise modeling and aircraft design has made a significant impact on the aviation industry. His patents reflect a deep understanding of the complexities involved in managing jet noise and improving aircraft performance.