(A) study on crowding out effects of provision of public goods in warm glow models

학위논문(석사) - 한국과학기술원 : 경영공학부, 2019.2,[ii, 27 p. :]공공경제학의 주요한 연구 주제 중 하나는 개인이 공공재 제공에 기여할 때 공공재 제공의 구축 효과에 관한 것이다. 이 논문에서는 조세 회피가 있는 따뜻한 빛 기부 모형에서, 공공재 제공 과정의 비효율성이라는 요소를 추가로 고려했을 때의 구축 효과를 분석한다. 만약 공공재 제공의 비효율성의 정도가 충분히 작다면, 개인의 따뜻한 빛 효과가 커질수록 공공재에 대한 구축 효과가 증가한다. 하지만 비효율성의 정도가 일정 수준 이상이라면, 개인의 따뜻한 빛 효과가 커질수록 공공재에 대한 구축 효과는 반대로 감소한다.한국과학기술원 :경영공학부

RELAP5와 MAAP4를 활용한 가압경수로 중대사고 연계해석 체계 개발

Thesis(doctors) --서울대학교 대학원 :원자핵공학과,2009.2.Docto

Computation of Supersonic Ramp Flow with V2F Turbulence Mode

The V2F turbulence model, which has shown very good performance in several test cases at low speeds, has been applied to supersonic ramp flow with 20. corner angle at the free stream Mach number of 2.79. The flow is known to manifest strong shock wave/turbulent boundary layer interactions. As a comparative study, low-Reynolds k-ε models are also considered. While the V2F model predicts wall-pressure distribution well, it relatively predicts larger separation bubble and higher skin-friction after the reattachment than the experimental data. Although the ellpticity of f equation is the characteristics of incompressible flows, the converged solutions are acquired in the compressible flow with shock waves. The effect of the realizability constraints used in the model is also examined. In contrast to the result of impinging jet flows, the realizability bounds proposed by Durbin deterioate the overall solutions of the supersonic ramp flow

Ristorcelli의 압축성 난류 모형을 이용한 초음속 유동의 계산Computations of Supersonic Flow with Ristorcelli′s Compressible Turbulence Model

Three-dimensional endwall flow within a linear cascade passage of high performance turbine blade is simulated with a 3-D Wavier-Stokes CFD code (MOSA3D), which is based on body-fitted coordinate system, pressure-correction and finite volume method. the endwall flow characteristics, including the development and generation of horseshoe vortex, passage vortex, etc. are clearly simulated, consistent with the generally known tendency The effects of both turbulence model and convective differencing scheme on the Prediction performance of endwall flow are systematically analyzed in the present paper. The convective scheme is found to have stronger effect than the turbulence modei on the prediction performance of endwall flow. The present simulation result also indicates that the suction leg of the horseshoe vortex continues on the suction side until it reaches the trailing edge