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RISS 인기검색어
- 검색키워드
- 저자 : Sourabh Khurana (검색결과 3 건)
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Effect of jet diameter on erosion of turgo impulse turbine runner
Sourabh Khurana,Varun 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.11
Erosion of hydro turbine components is a complex phenomenon which depends upon different parameters such as silt size, silt concentration,jet velocity, hardness of silt particles, properties of base materials, jet diameter and operating hours of turbine. Several investigationshave studied the effect of these parameters on erosive wear. In the present study an experimental investigation has been carried outon a small scale Turgo Impulse turbine to study the effect of jet diameter, silt size, silt concentration and operating hours of turbine. Samplesof silt were collected from Dehar power house, India. Based on experimental investigation, a correlation has been developed for theestimation of normalized wear of a Turgo impulse turbine runner.
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A review of metallic radiation recuperators for thermal exhaust heat recovery
Harshdeep Sharma,Anoop Kumar,Varun,Sourabh Khurana 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.3
Radiation recuperator is a class of indirect contact heat exchanger widely used for waste heat recovery in high temperature industrialapplications. At higher temperatures heat loss is higher and as the cost of energy continues to rise, it becomes imperative to save energyand improve overall energy efficiency. In this light, a radiation recuperator becomes a key component in an energy recovery system withgreat potential for energy saving. Improving recuperator performance, durability, and its design and material considerations has been anongoing concern. Recent progress in furnace design and micro turbine applications together with use of recuperators has resulted in reducedfuel consumption, increased cost effectiveness and short pay-back time periods. Due to its high commercial value and confidentialnature of the industry, little information is available in the open literature as compared to convection recuperators where results are welldocumented. This review paper intends to bridge the gap in literature and provides valuable information on experimental and theoreticalinvestigations in radiation recuperator development along with identification of some unresolved issues.
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Rajneesh Kumar,Varun Goel,Anoop Kumar,Sourabh Khurana,Paramvir Singh,Santosh B. Bopche 대한기계학회 2018 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.32 No.1
The Computational fluid dynamics (CFD) based analysis is carried out to investigate the thermal and hydraulic performance of circular rib roughened triangular passage Solar air heater (SAH). The circular ribs were provided over the absorber plate. The roughness parameter such as relative roughness pitch (P/e) and relative roughness height (e/D) varies from 4 to 20 and 0.015 to 0.06 (in four sets), respectively, the Reynolds number (Re) varies from 4000 to 18000. The flow governing equations were solved using commercial ANSYS (Fluent) software. The predicted Nusselt number (Nu) and friction factor (f) are validated with the available experimental results. The thermal and hydraulic performance of roughened duct is estimated in the form of Nusselt number and friction factor, respectively. The Thermohydraulic performance parameter (TPP) is also evaluated depending on the friction factor (f) and Nusselt number (Nu) values for SAH. The maximum Thermohydraulic performance parameter (TPP) is observed at Reynolds number of 15000 in case of relative roughness pitch (P/e) and relative roughness height (e/D) value of 12 and 0.06, respectively.
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