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TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN
- Vol.15(2017)
  - No.APISAT- ･･･
- Vol.14(2016)
  - No.ists30 ･･･
- Vol.13(2015)
- Vol.12(2014)
  - No.APISAT- ･･･
  - No.ists29 ･･･
- Vol.11(2013)
- Vol.10(2012)
  - No.ists28 ･･･
- Vol.9(2011)
- Vol.8(2010)
  - No.ists27 ･･･

Predecessor

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, SPACE TECHNOLOGY JAPAN

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN Vol. 15(2017)

Airport Noise Estimation within the Conceptual Design Study on LH2-Fueled Supersonic Transport

Tatsunori YUHARA, Yoshikazu MAKINO, Kenichi RINOIE

Type: Full Article

Subject Area: Unconventional Aircraft

Released: February 22, 2017

p.1-6

This paper evaluates the reduction of airport noise that can be expected from an optimized LH2-fueled SST due to its shorter takeoff and landing performance compared to an equivalent kerosene-fueled SST. An initial comparison shows that flyover noise is reduced by 7.7EPNdB since the LH2-fueled SST has a steeper climb following a shorter takeoff roll. Although sideline and approach noises are increased, the total cumulative loudness is reduced by 6.5EPNdB. Then, the effect of reduced-thrust takeoff is evaluated for the LH2-fueled SST, which has a takeoff performance surplus. The result shows the sideline noise is reduced while flyover noise is increased. A parametric study is also conducted for further airport noise reduction potential.

Validation and Verification of a Numerical Prediction Method for Lift-off Acoustics of Launch Vehicles

Seiji TSUTSUMI, Keita TERASHIMA

Type: Full Article

Subject Area: Aerodynamics

Released: April 27, 2017

p.7-12

To predict harmful acoustic loading due to the intense acoustic waves generated by exhaust jets from propulsion systems of launch vehicles during lift-off, a numerical method based on computational fluid dynamics is developed. High-fidelity large-eddy simulations, or hybrid large-eddy and Reynolds-averaged Navier-Stokes simulations are employed for the computation of the hydrodynamic field. Computational aeroacoustic simulations based on full-Euler equations are applied to compute acoustic propagation to the farfield. Validation and verification studies are conducted using experimental results of free and impinging jets from a 2.4%-scale solid motor. It is found that the prediction accuracy with approximately 4 dB in overall sound-pressure level is obtained for both the free and impinging jets.

On-board Orbit Determination using Sun Sensor and Optical Navigation Camera for Deep-Space Missions

Yosuke KAWABATA, Yasuhiro KAWAKATSU

Type: Full Article

Subject Area: Astronautics

Released: August 01, 2017

p.13-19

On-board orbit determination (OD) using a Sun sensor and optical navigation camera (ONC) for autonomous navigation (AutoNav) is discussed in this paper. In low-Earth orbits, a global positioning system (GPS) is used for AutoNav. On the other hand, in deep space, the OD has been performed using range and range-rate (RARR), which is a traditional ground-tracking approach applying radio waves. RARR enables OD to have higher accuracy compared to other methods. However, such radio navigation has inevitable problems, such as the delay of radio waves, reduction in radio-wave strength and transmitter limitations. The influence of these problems becomes significant, especially for deep-space missions. Furthermore, it requires ground station staff to operate the spacecraft with full attention, which increases the operational cost considerably. Therefore there has been a growing interest in the AutoNav of the spacecraft in recent years because AutoNav can eliminate the aforementioned problems. The utilization of the AutoNav in deep space can reduce the complexity of operation at the ground station, and especially has a significant impact on reducing operational cost. This paper focuses on the configuration of observation objects and the sampling frequency for observation. Finally, as an example, the selection of observation and Earth-resonant trajectory are discussed.

1 - 3 / 3 Articles.

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Volume And Issue List
TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN

Predecessor

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN Vol. 15(2017)

Airport Noise Estimation within the Conceptual Design Study on LH2-Fueled Supersonic Transport

Validation and Verification of a Numerical Prediction Method for Lift-off Acoustics of Launch Vehicles

On-board Orbit Determination using Sun Sensor and Optical Navigation Camera for Deep-Space Missions

System Maintenance

Announcement From J-STAGE

Journal Tools

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Volume And Issue List TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN

Predecessor

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN Vol. 15(2017)

Airport Noise Estimation within the Conceptual Design Study on LH2-Fueled Supersonic Transport

Validation and Verification of a Numerical Prediction Method for Lift-off Acoustics of Launch Vehicles

On-board Orbit Determination using Sun Sensor and Optical Navigation Camera for Deep-Space Missions

System Maintenance

Announcement From J-STAGE

Journal Tools

Share this Title

Volume And Issue List
TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN