한국가시화정보학회지 (Journal of the Korean Society of Visualization)

  • 제17권1호
  • /
  • Pages.85-92
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  • 2019
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  • 1598-8430(pISSN)
  • /
  • 2093-808X(eISSN)
한국가시화정보학회 (The Korean Society of Visualization)
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전산 가시화를 통한 무인 항공기용 연료전지 양극 산소 유로 최적화 연구

Optimization study on fuel cell cathode oxygen flow path for Unmanned Aerial Vehicle using computational visualization

  • 투고 : 2019.04.10
  • 심사 : 2019.04.29
  • 발행 : 2019.04.30
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초록

Numerical visualization is conducted to confirm the variation of flow characteristics and pressure drop by the shape of channels on the cathode flow path in hydrogen fuel cells for unmanned aerial vehicles(UAVs). Generally, a light-weight fan is commonly used rather than a heavy air compressor at UAVS. However, in case of blower fan, a large pressure drop in the flow path causes the blocking of the oxygen supply to the fuel cell. Therefore, the uniformity of flow inside the cathode has to be achieved by changing the shape of the cathode. The flow channel, the duct shape, and the diameter of the fan are changed to optimize the flow path. As a result, it is confirmed that the optimal flow path can decrease the velocity difference between the center and outer flow by 1.8%. However, It should be noted that the channel size can increase the pressure drop.

키워드

GSSGB0_2019_v17n1_85_f0001.png 이미지

Fig. 1. Geometry of 1/4 PEMFC with open cathode and ducts

GSSGB0_2019_v17n1_85_f0002.png 이미지

Fig. 2. Cross section of open cathode channels for PEMFC with three cases of duct (a) flat (b) spherical (c) concave

GSSGB0_2019_v17n1_85_f0003.png 이미지

Fig. 4. Geometry of PEMFC with three cases of duct diameter(a) 20 mm (b) 40 mm (c) 60 mm

GSSGB0_2019_v17n1_85_f0004.png 이미지

Fig. 5. Channel divisions of 1/4 Geometry cross section(a) Center (b) Outer edge

GSSGB0_2019_v17n1_85_f0005.png 이미지

Fig. 6. Channel depth-Velocity distribution Diagram

GSSGB0_2019_v17n1_85_f0006.png 이미지

Fig. 7. Velocity distribution of PEMFC cross section (x, y axis)

GSSGB0_2019_v17n1_85_f0007.png 이미지

Fig. 8. The difference of flow pattern due to Duct Shape(a) flat (b) spherical (c) concave

GSSGB0_2019_v17n1_85_f0008.png 이미지

Fig. 9. Duct diameter - Velocity distribution Diagram

GSSGB0_2019_v17n1_85_f0009.png 이미지

Fig. 10. Velocity distribution of PEMFC cross section (z axis)

GSSGB0_2019_v17n1_85_f0010.png 이미지

Fig. 11. Channel depth - Pressure drop diagram

GSSGB0_2019_v17n1_85_f0011.png 이미지

Fig. 12. Duct diameter – Pressure drop diagram

GSSGB0_2019_v17n1_85_f0012.png 이미지

Fig. 3. Cross section of open cathode channels for PEMFC with three cases of channel depth

Table 1. Grid dependency table

GSSGB0_2019_v17n1_85_t0001.png 이미지

Table 2. Velocity distribution

GSSGB0_2019_v17n1_85_t0002.png 이미지

참고문헌

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