http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : K. Manjunathachari (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Rajkumar D. Bhure,K. Manjunathachari 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.6
Today’s world is contemplating to set the new developments in radar to face the security challenges in defense. In the scope of radar signal processing, technical expertise in the signal processing, coding theory and techniques brought a lot of exposers to improve the detection probability in terms of range and position. The present art of work focusing on the detection of multiple moving targets using Doppler radar. Though the existing approaches try to increase the Merit Factor and range resolution of the acquired Signal, As such methods fail to fi nd out the target when they are in multiple and moving, due to which the amplitude of the side spikes (Noise) is much more with respect to the highest detectable limit. Those side spikes dominate the probability of detection of a target because the weak echoes from the small targets may be masked by these side spikes of huge moving targets. This recommended approach provides clear information about the targets with respect to Doppler by creating multiple clear windows at various Doppler’s with respect to the range. The amplitude of all windows is below 85–90 dB down, so all moving targets can be easily detected. This approach is validating by the use of Mat lab.
-
Effect of Gas Blockage on the Theoretical Performance of Thermoacoustic Refrigerators
B. G. Prashantha,G. S. V. L. NARASIMHAM,S. SEETHARAMU,K. Manjunathachari 대한설비공학회 2021 International Journal Of Air-Conditioning and Refr Vol.29 No.3
Thermoacoustic refrigeration is an emerging green, novel and promising alternate technology compared to vapor compression refrigerator systems for domestic cooling. It uses environmentally benign gases like air or helium or the mixture of inert gases as working substances and has no moving parts, no lubrication and no vibration. The cooler is designed and optimized with helium and air as refrigerants operating at 10bar with 3% drive ratio for the temperature difference of 28K and stack diameter of 200mm using linear thermoacoustic theory. In this paper, the effect of gas blockage (porosity) of the spiral-stack heat exchanger system ranging from 45% to 85% on the theoretical performance of the cooler is discussed. The one-third and one-fourth wavelength convergent–divergent resonator designs are optimized with air and helium as working substances, respectively, to improve performance and power density. The optimized coolers show best performance with 85% porosity. The theoretical results are validated with DeltaEC software simulation results. The simulation results show the coefficient of performance and cooling capacity of 0.93 and 219W for helium and of 0.50 and 139W for air, respectively, at the cold heat exchanger temperature of 0∘C.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
