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Moshfeghy, Zeinab,Asadi, Khadegeh,Akbarzadeh, Marzieh,Zare, Atefeh,Poordast, Tahereh,Emamghoreishi, Masoumeh,Najib, Fatemeh S.,Sayadi, Mehrab KOREAN PHARMACOPUNCTURE INSTITUTE 2018 Journal of pharmacopuncture Vol.21 No.3
Objectives: Vaginal Candidiasis with an approximate prevalence of 30% is the second cause of vaginal infections. Antifungal azole is the first treatment for Vaginal Candidiasis; however, some side effects have been reported for this chemical medicine. Based on the antifungal activity of Inner Stratum of Quercus Brantii (Q. Brantii), the aim of our study was to compare the effects of vaginal douche of Q. Brantii extract and clotrimazole on vaginal candidiasis symptoms before and after the treatments, in women. Methods: 89 non-pregnant women with positive KOH test which is capable of identifying the presence of hyphae and mycelium by adding KOH (10%), and a positive vaginal candidiasis culture were randomly divided into two experimental groups, using permuted block randomization method. One group received clotrimazole vaginal cream (1%) and the other group received vaginal douche of Q. Brantii extract. Groups were treated for 7 days and KOH tests and cultures were evaluated again. Data were analyzed via chi-square and independent t-test, using SPSS software. Results: According to the results, there were no significant differences between experimental groups for demographic characteristics like age (p=0.403), BMI (p=0.911), educational levels (p=0.862) and contraceptive methods (p=0.702). Moreover, significant differences were seen in vaginal discharge between the groups after the treatments (P=0.043). Conclusion: The results suggested that the therapeutic effect of vaginal douche of Q. Brantii extract was approximately similar to that of clotrimazole vaginal cream.
Zeinab Moshfeghy,Khadegeh Asadi,Marzieh Akbarzadeh,Atefeh Zare,Tahereh Poordast,Masoumeh Emamghoreishi,Fatemeh S.Najib4,Mehrab Sayadi 대한약침학회 2018 Journal of pharmacopuncture Vol.21 No.3
Objectives: Vaginal Candidiasis with an approximate prevalence of 30% is the second cause of vaginal infections. Antifungal azole is the first treatment for Vaginal Candidiasis; however, some side effects have been reported for this chemical medicine. Based on the antifungal activity of Inner Stratum of Quercus Brantii (Q. Brantii), the aim of our study was to compare the effects of vaginal douche of Q. Brantii extract and clotrimazole on vaginal candidiasis symptoms before and after the treatments, in women. Methods: 89 non-pregnant women with positive KOH test which is capable of identifying the presence of hyphae and mycelium by adding KOH (10%), and a positive vaginal candidiasis culture were randomly divided into two experimental groups, using permuted block randomization method. One group received clotrimazole vaginal cream (1%) and the other group received vaginal douche of Q. Brantii extract. Groups were treated for 7 days and KOH tests and cultures were evaluated again. Data were analyzed via chi-square and independent t-test, using SPSS software. Results: According to the results, there were no significant differences between experimental groups for demographic characteristics like age (p=0.403), BMI (p=0.911), educational levels (p=0.862) and contraceptive methods (p=0.702). Moreover, significant differences were seen in vaginal discharge between the groups after the treatments (P=0.043). Conclusion: The results suggested that the therapeutic effect of vaginal douche of Q. Brantii extract was approximately similar to that of clotrimazole vaginal cream.
Numerical Simulation of the SJA Flow for Prediction of Aerodynamic Behavior of an Airfoil
Mohammad Moshfeghi,Nahmkeon Hur 한국전산유체공학회 2014 한국전산유체공학회 학술대회논문집 Vol.2014 No.10
CFD Simulations are preferably popular because of their cost and simplicity. However, one source of the differences between the CFD and experimental results in a SJA simulation is the simplifications applied to the simulation, which cause different aerodynamics loads and flow structure on the suction surface of an airfoil. This paper numerically investigates the effect of different boundary conditions for the simulation of the SJA; including simulating the SJA using inlet surface at the suction surface of an airfoil and applying the moving mesh technique for simulation of the oscillating piston. The aim is to investigate effects of different methods on the aerodynamic behavior of an airfoil.
AN INVESTIGATION ON HVLS FAN PERFORMANCE WITH DIFFERENT BLADE CONFIGURATIONS
Mohammad Moshfeghi,Nahmkeon Hur(허남건),Young Joo Kim(김영주),Hyun Wook Kang(강현욱) 한국전산유체공학회 2014 한국전산유체공학회지 Vol.19 No.4
High-volume low-speed (HVLS) fans are one category of ceiling fan installed in large enclosings such as warehouses, large barns and health clubs in order to generate comfortable air circulation. As a rotary blade, aerodynamic performance of a HVLS fan is predominantly related to its airfoil(s), and the pitch and twist angles. This paper first, investigates the effects of airfoil on the performances of three different HVLS fans with NACA 5414, 6413 and 7415 airfoils. The fans have six untwisted blades with the diameter of 6 m and rotate at 60 RPM. The blades pitch angels are 12°, 12° and 13°, respectively. The results are presented in the form of the aerodynamic forces and moments, volumetric flow rate and streamlines. Regarding the volumetric flow of air, the results show that the model with NACA 7415 has the best performance. Hence, two other HVLS fans with the same airfoil but, with four and five blades are studied in order to investigate the effects of number of blades. From the point of view of air circulation still the six-bladed fan is the best one; however, the five-bladed fan is more efficient in power consumption.
Mohammad Moshfeghi(모하메드),Nahmkeon Hur(허남건) 한국전산유체공학회 2013 한국전산유체공학회 학술대회논문집 Vol.2013 No.10
The present research investigates the results of DES simulation of a finite span wing equipped with synthetic jet actuator (SJA), in order to study the influence of the jet exit location on the aerodynamic forces and streamlines. The wing airfoil is S809 with the chord length 400 mm, which is stretched 200 mm and rotated to create the angle of attack of 25℃. The momentum coefficient for the SJA is considered to be 4.5×10<SUP>- 3</SUP>. The results of the jet exit locations 0.25, 0.35 and 0.45 are analysed . It is observed that for all cases the SJA affects the aerodynamic behavior of wing and the flow patterns and aerodynamic forces on the wing are sensitively dependent on the jet exit location. When the jet exit location is at x/c=0.25, the SJA presents an effective role; however, for the cases in which the jet exit is located at x/c=0.35 or 0.45, the SJA effects become weaker and the range of results of are very close to each other.
풍차날개의 공력 성능 향상과 유동 박리 감소를 위한 수동 유동 제어에 대한 DES 해석
Mohammad Moshfeghi,Shahrokh Shams,Morteza Ramezani,허남건 한국전산유체공학회 2018 한국전산유체공학회지 Vol.23 No.4
Power generation of a horizontal axis wind turbine is severely dependent upon aerodynamic phenomena over the blade, especially the flow separation. Since, usually the local AoA (Angle of Attack) in the inner and middle parts of a blade is much greater than the separation onset, the blade section encounters a highly separated flow or even stall condition. Hence, flow control methods can be employed in order to reduce or weaken the negative effects of the separation. This paper investigates the effects of a recently verified passive flow control method for HAWTs via a validated three dimensional DES(Detached Eddy Simulation) of split versions of the S809 airfoil. In this research, two different airfoil families with four various split width values of 0.5, 1, 2 and 4 percent of chord length are simulated at a range of angle of attack from 0 to 25 degrees. As a result of existence of the split, flow from the high-pressure zone at the lower surfaces gets injected into the separated area over the suction surfaces. The positive or negative effect of this method is mainly dependent upon split end location on the suction surface. Direction of the jet flow with respect to the free stream and also the width of split are the other important parameters. Also, the findings reveal that in each family there exists one optimal split width for which the airfoil aerodynamic performance is enhanced remarkably.
Flow Control and Separation Reduction on Wind Turbine Airfoil
Mohammad Moshfeghi,Nahmkeon Hur 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
An innovative passive flow control method is proposed for aerodynamic performance enhancement over the wind turbine airfoils. The new geometry is based on splitting airfoil and is investigated by numerical simulations. Three dimensional CFD simulations are carried out using the SST-k-ω turbulence model. The results show that the split airfoil can produce more lift and less drag by weakening the separation effects and breaking down the large vortex into small vortices. It is observed that level of influence of split depend on split exit location inside the separated flow. For the small AOAs the injected flow through the split triggers an early separation which consequently reduces the airfoil efficiency. However, at high AOA where the upper end of split falls deep inside the separated area, injected flow through the slot effectively increases the airfoil performance. For AOAs at which the separation point occurs near the split exit, the airfoil’s aerodynamic forces are not changed significantly.